61238399064 has 64 divisors (see below), whose sum is σ = 153448719840. Its totient is φ = 20365839360.

The previous prime is 61238399021. The next prime is 61238399069. The reversal of 61238399064 is 46099383216.

It is a junction number, because it is equal to n+sod(n) for n = 61238398998 and 61238399016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61238399069) 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, 28442212 + ... + 28444364.

Almost surely, 2^61238399064 is an apocalyptic number.

It is an amenable number.

61238399064 is an abundant number, since it is smaller than the sum of its proper divisors (92210320776).

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

61238399064 is a wasteful number, since it uses less digits than its factorization.

61238399064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4340 (or 4336 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 51.

The spelling of 61238399064 in words is "sixty-one billion, two hundred thirty-eight million, three hundred ninety-nine thousand, sixty-four".