61556303825 has 12 divisors (see below), whose sum is σ = 76333411968. Its totient is φ = 49242723600.

The previous prime is 61556303779. The next prime is 61556303857. The reversal of 61556303825 is 52830365516.

61556303825 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61556303825 - 2¹² = 61556299729 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 655580 + ... + 743570.

It is an arithmetic number, because the mean of its divisors is an integer number (6361117664).

Almost surely, 2^61556303825 is an apocalyptic number.

It is an amenable number.

61556303825 is a deficient number, since it is larger than the sum of its proper divisors (14777108143).

61556303825 is a wasteful number, since it uses less digits than its factorization.

61556303825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115984 (or 115979 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 44.

The spelling of 61556303825 in words is "sixty-one billion, five hundred fifty-six million, three hundred three thousand, eight hundred twenty-five".