651230316536645 has 4 divisors (see below), whose sum is σ = 781476379843980. Its totient is φ = 520984253229312.

The previous prime is 651230316536573. The next prime is 651230316536711. The reversal of 651230316536645 is 546635613032156.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 479326174203361 + 171904142333284 = 21893519^2 + 13111222^2 .

It is a cyclic number.

It is not a de Polignac number, because 651230316536645 - 2²² = 651230312342341 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65123031653660 + ... + 65123031653669.

It is an arithmetic number, because the mean of its divisors is an integer number (195369094960995).

Almost surely, 2^{651230316536645} is an apocalyptic number.

It is an amenable number.

651230316536645 is a deficient number, since it is larger than the sum of its proper divisors (130246063307335).

651230316536645 is a wasteful number, since it uses less digits than its factorization.

651230316536645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130246063307334.

The product of its (nonzero) digits is 34992000, while the sum is 56.

The spelling of 651230316536645 in words is "six hundred fifty-one trillion, two hundred thirty billion, three hundred sixteen million, five hundred thirty-six thousand, six hundred forty-five".