155799816 has 16 divisors (see below), whose sum is σ = 389499600. Its totient is φ = 51933264.

The previous prime is 155799799. The next prime is 155799817. The reversal of 155799816 is 618997551.

It is not an unprimeable number, because it can be changed into a prime (155799817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3245806 + ... + 3245853.

It is an arithmetic number, because the mean of its divisors is an integer number (24343725).

Almost surely, 2^155799816 is an apocalyptic number.

It is an amenable number.

155799816 is an abundant number, since it is smaller than the sum of its proper divisors (233699784).

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

155799816 is a wasteful number, since it uses less digits than its factorization.

155799816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6491668 (or 6491664 counting only the distinct ones).

The product of its digits is 680400, while the sum is 51.

The square root of 155799816 is about 12481.9796506804. The cubic root of 155799816 is about 538.0908991760.

The spelling of 155799816 in words is "one hundred fifty-five million, seven hundred ninety-nine thousand, eight hundred sixteen".