61216992 has 48 divisors (see below), whose sum is σ = 178552080. Its totient is φ = 20405376.

The previous prime is 61216973. The next prime is 61217011. The reversal of 61216992 is 29961216.

It is an interprime number because it is at equal distance from previous prime (61216973) and next prime (61217011).

It is a tau number, because it is divible by the number of its divisors (48).

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

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34563 + ... + 36290.

It is an arithmetic number, because the mean of its divisors is an integer number (3719835).

Almost surely, 2^61216992 is an apocalyptic number.

It is an amenable number.

61216992 is an abundant number, since it is smaller than the sum of its proper divisors (117335088).

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

61216992 is a wasteful number, since it uses less digits than its factorization.

61216992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70872 (or 70858 counting only the distinct ones).

The product of its digits is 11664, while the sum is 36.

The square root of 61216992 is about 7824.1288332951. The cubic root of 61216992 is about 394.1159355457.

The spelling of 61216992 in words is "sixty-one million, two hundred sixteen thousand, nine hundred ninety-two".