61171357025 has 24 divisors (see below), whose sum is σ = 77005190400. Its totient is φ = 48196512000.

The previous prime is 61171356977. The next prime is 61171357063. The reversal of 61171357025 is 52075317116.

61171357025 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 61171357025 - 2⁸ = 61171356769 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61171357025.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 753356 + ... + 830594.

It is an arithmetic number, because the mean of its divisors is an integer number (3208549600).

Almost surely, 2^61171357025 is an apocalyptic number.

It is an amenable number.

61171357025 is a deficient number, since it is larger than the sum of its proper divisors (15833833375).

61171357025 is a wasteful number, since it uses less digits than its factorization.

61171357025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77729 (or 77724 counting only the distinct ones).

The product of its (nonzero) digits is 44100, while the sum is 38.

The spelling of 61171357025 in words is "sixty-one billion, one hundred seventy-one million, three hundred fifty-seven thousand, twenty-five".