61577110525 has 36 divisors (see below), whose sum is σ = 92683701792. Its totient is φ = 40388446560.

The previous prime is 61577110519. The next prime is 61577110577. The reversal of 61577110525 is 52501177516.

It is not a de Polignac number, because 61577110525 - 2¹¹ = 61577108477 is a prime.

It is a Duffinian number.

It is a congruent 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 35 ways as a sum of consecutive naturals, for example, 1064587 + ... + 1120936.

It is an arithmetic number, because the mean of its divisors is an integer number (2574547272).

Almost surely, 2^61577110525 is an apocalyptic number.

It is an amenable number.

61577110525 is a deficient number, since it is larger than the sum of its proper divisors (31106591267).

61577110525 is a wasteful number, since it uses less digits than its factorization.

61577110525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2185570 (or 2185558 counting only the distinct ones).

The product of its (nonzero) digits is 73500, while the sum is 40.

The spelling of 61577110525 in words is "sixty-one billion, five hundred seventy-seven million, one hundred ten thousand, five hundred twenty-five".