651306563551 has 32 divisors (see below), whose sum is σ = 784912204800. Its totient is φ = 528664872960.

The previous prime is 651306563543. The next prime is 651306563591. The reversal of 651306563551 is 155365603156.

It is not a de Polignac number, because 651306563551 - 2³ = 651306563543 is a prime.

It is a super-2 number, since 2×651306563551² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651306563521) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2664640 + ... + 2898778.

It is an arithmetic number, because the mean of its divisors is an integer number (24528506400).

Almost surely, 2^651306563551 is an apocalyptic number.

651306563551 is a deficient number, since it is larger than the sum of its proper divisors (133605641249).

651306563551 is a wasteful number, since it uses less digits than its factorization.

651306563551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234439.

The product of its (nonzero) digits is 1215000, while the sum is 46.

The spelling of 651306563551 in words is "six hundred fifty-one billion, three hundred six million, five hundred sixty-three thousand, five hundred fifty-one".