61956787291025 has 24 divisors (see below), whose sum is σ = 83814958588608. Its totient is φ = 45057157640000.

The previous prime is 61956787291013. The next prime is 61956787291033. The reversal of 61956787291025 is 52019278765916.

It is a de Polignac number, because none of the positive numbers 2^k-61956787291025 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 459581 + ... + 11141130.

It is an arithmetic number, because the mean of its divisors is an integer number (3492289941192).

Almost surely, 2^{61956787291025} is an apocalyptic number.

It is an amenable number.

61956787291025 is a deficient number, since it is larger than the sum of its proper divisors (21858171297583).

61956787291025 is a wasteful number, since it uses less digits than its factorization.

61956787291025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11620153 (or 11620148 counting only the distinct ones).

The product of its (nonzero) digits is 114307200, while the sum is 68.

The spelling of 61956787291025 in words is "sixty-one trillion, nine hundred fifty-six billion, seven hundred eighty-seven million, two hundred ninety-one thousand, twenty-five".