61531632365 has 8 divisors (see below), whose sum is σ = 84386238720. Its totient is φ = 42193119312.

The previous prime is 61531632359. The next prime is 61531632419. The reversal of 61531632365 is 56323613516.

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 61531632365 - 2⁸ = 61531632109 is a prime.

It is a super-2 number, since 2×61531632365² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 879023285 + ... + 879023354.

It is an arithmetic number, because the mean of its divisors is an integer number (10548279840).

Almost surely, 2^61531632365 is an apocalyptic number.

It is an amenable number.

61531632365 is a deficient number, since it is larger than the sum of its proper divisors (22854606355).

61531632365 is a wasteful number, since it uses less digits than its factorization.

61531632365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1758046651.

The product of its digits is 291600, while the sum is 41.

The spelling of 61531632365 in words is "sixty-one billion, five hundred thirty-one million, six hundred thirty-two thousand, three hundred sixty-five".