651837124272 has 30 divisors (see below), whose sum is σ = 1683927021252. Its totient is φ = 217277176896.

The previous prime is 651837124247. The next prime is 651837124291. The reversal of 651837124272 is 272421738156.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5535318 + ... + 5651850.

Almost surely, 2^651837124272 is an apocalyptic number.

It is an amenable number.

651837124272 is an abundant number, since it is smaller than the sum of its proper divisors (1032089896980).

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

651837124272 is an frugal number, since it uses more digits than its factorization.

651837124272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233077 (or 116538 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 48.

Multiplying 651837124272 by its sum of digits (48), we get a square (31288181965056 = 5593584²).

651837124272 divided by its sum of digits (48) gives a square (13579940089 = 116533²).

The spelling of 651837124272 in words is "six hundred fifty-one billion, eight hundred thirty-seven million, one hundred twenty-four thousand, two hundred seventy-two".