651653396406 has 64 divisors (see below), whose sum is σ = 1489231526400. Its totient is φ = 211127480928.

The previous prime is 651653396369. The next prime is 651653396447. The reversal of 651653396406 is 604693356156.

It is a happy number.

651653396406 is a `hidden beast` number, since 6 + 5 + 16 + 533 + 96 + 4 + 0 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

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, 757746 + ... + 1370213.

It is an arithmetic number, because the mean of its divisors is an integer number (23269242600).

Almost surely, 2^651653396406 is an apocalyptic number.

651653396406 is an abundant number, since it is smaller than the sum of its proper divisors (837578129994).

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

651653396406 is a wasteful number, since it uses less digits than its factorization.

651653396406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2128130 (or 2128124 counting only the distinct ones).

The product of its (nonzero) digits is 10497600, while the sum is 54.

The spelling of 651653396406 in words is "six hundred fifty-one billion, six hundred fifty-three million, three hundred ninety-six thousand, four hundred six".