64619931072 has 112 divisors (see below), whose sum is σ = 181538392320. Its totient is φ = 20216082432.

The previous prime is 64619931053. The next prime is 64619931161. The reversal of 64619931072 is 27013991646.

64619931072 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1144203 + ... + 1199349.

Almost surely, 2^64619931072 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64619931072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90769196160).

64619931072 is an abundant number, since it is smaller than the sum of its proper divisors (116918461248).

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

64619931072 is a wasteful number, since it uses less digits than its factorization.

64619931072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55538 (or 55528 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 48.

The spelling of 64619931072 in words is "sixty-four billion, six hundred nineteen million, nine hundred thirty-one thousand, seventy-two".