64402162320 has 160 divisors (see below), whose sum is σ = 202237305984. Its totient is φ = 16952320000.

The previous prime is 64402162283. The next prime is 64402162343. The reversal of 64402162320 is 2326120446.

64402162320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×64402162320² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6802390 + ... + 6811850.

Almost surely, 2^64402162320 is an apocalyptic number.

64402162320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64402162320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101118652992).

64402162320 is an abundant number, since it is smaller than the sum of its proper divisors (137835143664).

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

64402162320 is a wasteful number, since it uses less digits than its factorization.

64402162320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9841 (or 9835 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

Adding to 64402162320 its reverse (2326120446), we get a palindrome (66728282766).

The spelling of 64402162320 in words is "sixty-four billion, four hundred two million, one hundred sixty-two thousand, three hundred twenty".