61161232504 has 32 divisors (see below), whose sum is σ = 118445408640. Its totient is φ = 29576937600.

The previous prime is 61161232501. The next prime is 61161232511. The reversal of 61161232504 is 40523216116.

It is a happy number.

It is a super-2 number, since 2×61161232504² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61161232501) 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, 360942 + ... + 502594.

It is an arithmetic number, because the mean of its divisors is an integer number (3701419020).

Almost surely, 2^61161232504 is an apocalyptic number.

It is an amenable number.

61161232504 is a deficient number, since it is larger than the sum of its proper divisors (57284176136).

61161232504 is a wasteful number, since it uses less digits than its factorization.

61161232504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143431 (or 143427 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The spelling of 61161232504 in words is "sixty-one billion, one hundred sixty-one million, two hundred thirty-two thousand, five hundred four".