61140631456 has 12 divisors (see below), whose sum is σ = 120370618242. Its totient is φ = 30570315712.

The previous prime is 61140631417. The next prime is 61140631457. The reversal of 61140631456 is 65413604116.

It can be written as a sum of positive squares in only one way, i.e., 35840547856 + 25300083600 = 189316^2 + 159060^2 .

It is not an unprimeable number, because it can be changed into a prime (61140631457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 955322335 + ... + 955322398.

Almost surely, 2^61140631456 is an apocalyptic number.

It is an amenable number.

61140631456 is a deficient number, since it is larger than the sum of its proper divisors (59229986786).

61140631456 is a wasteful number, since it uses less digits than its factorization.

61140631456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1910644743 (or 1910644735 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 37.

The spelling of 61140631456 in words is "sixty-one billion, one hundred forty million, six hundred thirty-one thousand, four hundred fifty-six".