61131565517 has 8 divisors (see below), whose sum is σ = 66924634080. Its totient is φ = 55377772560.

The previous prime is 61131565499. The next prime is 61131565541. The reversal of 61131565517 is 71556513116.

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

It is not a de Polignac number, because 61131565517 - 2¹⁶ = 61131499981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61131565567) 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, 9815642 + ... + 9821867.

It is an arithmetic number, because the mean of its divisors is an integer number (8365579260).

Almost surely, 2^61131565517 is an apocalyptic number.

It is an amenable number.

61131565517 is a deficient number, since it is larger than the sum of its proper divisors (5793068563).

61131565517 is a wasteful number, since it uses less digits than its factorization.

61131565517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19637803.

The product of its digits is 94500, while the sum is 41.

The spelling of 61131565517 in words is "sixty-one billion, one hundred thirty-one million, five hundred sixty-five thousand, five hundred seventeen".