61356512 has 24 divisors (see below), whose sum is σ = 138052656. Its totient is φ = 26295552.

The previous prime is 61356509. The next prime is 61356517. The reversal of 61356512 is 21565316.

It is a super-2 number, since 2×61356512² = 7529243129612288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61356517) 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, 136733 + ... + 137180.

It is an arithmetic number, because the mean of its divisors is an integer number (5752194).

Almost surely, 2^61356512 is an apocalyptic number.

It is an amenable number.

61356512 is an abundant number, since it is smaller than the sum of its proper divisors (76696144).

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

61356512 is a wasteful number, since it uses less digits than its factorization.

61356512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273930 (or 273922 counting only the distinct ones).

The product of its digits is 5400, while the sum is 29.

The square root of 61356512 is about 7833.0397675487. The cubic root of 61356512 is about 394.4151190054.

The spelling of 61356512 in words is "sixty-one million, three hundred fifty-six thousand, five hundred twelve".