61238399016 has 16 divisors (see below), whose sum is σ = 153095997600. Its totient is φ = 20412799664.

The previous prime is 61238399009. The next prime is 61238399021. The reversal of 61238399016 is 61099383216.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1275799956 + ... + 1275800003.

It is an arithmetic number, because the mean of its divisors is an integer number (9568499850).

Almost surely, 2^61238399016 is an apocalyptic number.

It is an amenable number.

61238399016 is an abundant number, since it is smaller than the sum of its proper divisors (91857598584).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61238399016 is a wasteful number, since it uses less digits than its factorization.

61238399016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2551599968 (or 2551599964 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 48.

The spelling of 61238399016 in words is "sixty-one billion, two hundred thirty-eight million, three hundred ninety-nine thousand, sixteen".