651620056505 has 32 divisors (see below), whose sum is σ = 854335392768. Its totient is φ = 473180875200.

The previous prime is 651620056403. The next prime is 651620056511. The reversal of 651620056505 is 505650026156.

It is not a de Polignac number, because 651620056505 - 2⁸ = 651620056249 is a prime.

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, 126599342 + ... + 126604488.

It is an arithmetic number, because the mean of its divisors is an integer number (26697981024).

Almost surely, 2^651620056505 is an apocalyptic number.

It is an amenable number.

651620056505 is a deficient number, since it is larger than the sum of its proper divisors (202715336263).

651620056505 is a wasteful number, since it uses less digits than its factorization.

651620056505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8237.

The product of its (nonzero) digits is 270000, while the sum is 41.

The spelling of 651620056505 in words is "six hundred fifty-one billion, six hundred twenty million, fifty-six thousand, five hundred five".