65156064420 has 96 divisors (see below), whose sum is σ = 184645504512. Its totient is φ = 17165611008.

The previous prime is 65156064401. The next prime is 65156064433. The reversal of 65156064420 is 2446065156.

65156064420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 2106789 + ... + 2137491.

It is an arithmetic number, because the mean of its divisors is an integer number (1923390672).

Almost surely, 2^65156064420 is an apocalyptic number.

65156064420 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 65156064420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92322752256).

65156064420 is an abundant number, since it is smaller than the sum of its proper divisors (119489440092).

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

65156064420 is a wasteful number, since it uses less digits than its factorization.

65156064420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31141 (or 31139 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 39.

The spelling of 65156064420 in words is "sixty-five billion, one hundred fifty-six million, sixty-four thousand, four hundred twenty".