61510555512 has 96 divisors (see below), whose sum is σ = 191490605280. Its totient is φ = 17472833280.

The previous prime is 61510555453. The next prime is 61510555529. The reversal of 61510555512 is 21555501516.

61510555512 is a `hidden beast` number, since 6 + 1 + 51 + 0 + 55 + 551 + 2 = 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 (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 265539 + ... + 439922.

It is an arithmetic number, because the mean of its divisors is an integer number (1994693805).

Almost surely, 2^61510555512 is an apocalyptic number.

It is an amenable number.

61510555512 is an abundant number, since it is smaller than the sum of its proper divisors (129980049768).

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

61510555512 is a wasteful number, since it uses less digits than its factorization.

61510555512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 705653 (or 705646 counting only the distinct ones).

The product of its (nonzero) digits is 37500, while the sum is 36.

The spelling of 61510555512 in words is "sixty-one billion, five hundred ten million, five hundred fifty-five thousand, five hundred twelve".