61831358804 has 18 divisors (see below), whose sum is σ = 113113987770. Its totient is φ = 29571518416.

The previous prime is 61831358803. The next prime is 61831358837. The reversal of 61831358804 is 40885313816.

It can be written as a sum of positive squares in only one way, i.e., 42147268804 + 19684090000 = 205298^2 + 140300^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61831358803) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14608319 + ... + 14612550.

Almost surely, 2^61831358804 is an apocalyptic number.

It is an amenable number.

61831358804 is a deficient number, since it is larger than the sum of its proper divisors (51282628966).

61831358804 is a wasteful number, since it uses less digits than its factorization.

61831358804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29220919 (or 29220894 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 47.

The spelling of 61831358804 in words is "sixty-one billion, eight hundred thirty-one million, three hundred fifty-eight thousand, eight hundred four".