61249431317 has 16 divisors (see below), whose sum is σ = 63720724992. Its totient is φ = 58809576960.

The previous prime is 61249431307. The next prime is 61249431407. The reversal of 61249431317 is 71313494216.

It is a cyclic number.

It is not a de Polignac number, because 61249431317 - 2¹² = 61249427221 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 (61249431307) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13660358 + ... + 13664840.

It is an arithmetic number, because the mean of its divisors is an integer number (3982545312).

Almost surely, 2^61249431317 is an apocalyptic number.

It is an amenable number.

61249431317 is a deficient number, since it is larger than the sum of its proper divisors (2471293675).

61249431317 is a wasteful number, since it uses less digits than its factorization.

61249431317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7868.

The product of its digits is 108864, while the sum is 41.

The spelling of 61249431317 in words is "sixty-one billion, two hundred forty-nine million, four hundred thirty-one thousand, three hundred seventeen".