651538527220 has 48 divisors (see below), whose sum is σ = 1563783032448. Its totient is φ = 223371699840.

The previous prime is 651538527193. The next prime is 651538527221. The reversal of 651538527220 is 22725835156.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651538527221) 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, 2470239 + ... + 2721241.

It is an arithmetic number, because the mean of its divisors is an integer number (32578813176).

Almost surely, 2^651538527220 is an apocalyptic number.

It is an amenable number.

651538527220 is an abundant number, since it is smaller than the sum of its proper divisors (912244505228).

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

651538527220 is a wasteful number, since it uses less digits than its factorization.

651538527220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269560 (or 269558 counting only the distinct ones).

The product of its (nonzero) digits is 1008000, while the sum is 46.

The spelling of 651538527220 in words is "six hundred fifty-one billion, five hundred thirty-eight million, five hundred twenty-seven thousand, two hundred twenty".