61198910657 has 8 divisors (see below), whose sum is σ = 64801176192. Its totient is φ = 57596904000.

The previous prime is 61198910653. The next prime is 61198910713. The reversal of 61198910657 is 75601989116.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61198910657 - 2² = 61198910653 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61198910599 and 61198910608.

It is not an unprimeable number, because it can be changed into a prime (61198910653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 643532 + ... + 732482.

It is an arithmetic number, because the mean of its divisors is an integer number (8100147024).

Almost surely, 2^61198910657 is an apocalyptic number.

It is an amenable number.

61198910657 is a deficient number, since it is larger than the sum of its proper divisors (3602265535).

61198910657 is a wasteful number, since it uses less digits than its factorization.

61198910657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129439.

The product of its (nonzero) digits is 816480, while the sum is 53.

The spelling of 61198910657 in words is "sixty-one billion, one hundred ninety-eight million, nine hundred ten thousand, six hundred fifty-seven".