1365644016 has 80 divisors (see below), whose sum is σ = 4276273920. Its totient is φ = 413830080.

The previous prime is 1365643999. The next prime is 1365644039. The reversal of 1365644016 is 6104465631.

It is a happy number.

1365644016 is a `hidden beast` number, since 1 + 3 + 6 + 5 + 644 + 0 + 1 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138940 + ... + 148443.

It is an arithmetic number, because the mean of its divisors is an integer number (53453424).

Almost surely, 2^1365644016 is an apocalyptic number.

1365644016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1365644016 is an abundant number, since it is smaller than the sum of its proper divisors (2910629904).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1365644016 is a wasteful number, since it uses less digits than its factorization.

1365644016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287411 (or 287399 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 1365644016 is about 36954.6210371585. The cubic root of 1365644016 is about 1109.4621791924.

The spelling of 1365644016 in words is "one billion, three hundred sixty-five million, six hundred forty-four thousand, sixteen".