61857466617 has 32 divisors (see below), whose sum is σ = 85080844800. Its totient is φ = 39954790400.

The previous prime is 61857466609. The next prime is 61857466621. The reversal of 61857466617 is 71666475816.

It is a cyclic number.

It is not a de Polignac number, because 61857466617 - 2³ = 61857466609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61857466637) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16711867 + ... + 16715567.

It is an arithmetic number, because the mean of its divisors is an integer number (2658776400).

Almost surely, 2^61857466617 is an apocalyptic number.

It is an amenable number.

61857466617 is a deficient number, since it is larger than the sum of its proper divisors (23223378183).

61857466617 is a wasteful number, since it uses less digits than its factorization.

61857466617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4913.

The product of its digits is 10160640, while the sum is 57.

The spelling of 61857466617 in words is "sixty-one billion, eight hundred fifty-seven million, four hundred sixty-six thousand, six hundred seventeen".