61571302111431 has 24 divisors (see below), whose sum is σ = 101643085144224. Its totient is φ = 35183057555520.

The previous prime is 61571302111427. The next prime is 61571302111457. The reversal of 61571302111431 is 13411120317516.

61571302111431 is a `hidden beast` number, since 6 + 1 + 5 + 7 + 1 + 3 + 0 + 211 + 1 + 431 = 666.

It is not a de Polignac number, because 61571302111431 - 2² = 61571302111427 is a prime.

It is a super-2 number, since 2×61571302111431² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61571302111471) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3423400 + ... + 11613021.

It is an arithmetic number, because the mean of its divisors is an integer number (4235128547676).

Almost surely, 2^{61571302111431} is an apocalyptic number.

61571302111431 is a deficient number, since it is larger than the sum of its proper divisors (40071783032793).

61571302111431 is a wasteful number, since it uses less digits than its factorization.

61571302111431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15101431 (or 15101428 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

Adding to 61571302111431 its reverse (13411120317516), we get a palindrome (74982422428947).

The spelling of 61571302111431 in words is "sixty-one trillion, five hundred seventy-one billion, three hundred two million, one hundred eleven thousand, four hundred thirty-one".