61497343131 has 96 divisors (see below), whose sum is σ = 100931040000. Its totient is φ = 33161280768.

The previous prime is 61497343109. The next prime is 61497343147. The reversal of 61497343131 is 13134379416.

It is not a de Polignac number, because 61497343131 - 2⁷ = 61497343003 is a prime.

It is a super-2 number, since 2×61497343131² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61497343151) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 39700545 + ... + 39702093.

It is an arithmetic number, because the mean of its divisors is an integer number (1051365000).

Almost surely, 2^61497343131 is an apocalyptic number.

61497343131 is a deficient number, since it is larger than the sum of its proper divisors (39433696869).

61497343131 is a wasteful number, since it uses less digits than its factorization.

61497343131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1801 (or 1794 counting only the distinct ones).

The product of its digits is 163296, while the sum is 42.

The spelling of 61497343131 in words is "sixty-one billion, four hundred ninety-seven million, three hundred forty-three thousand, one hundred thirty-one".