651616604 has 6 divisors (see below), whose sum is σ = 1140329064. Its totient is φ = 325808300.

The previous prime is 651616597. The next prime is 651616619. The reversal of 651616604 is 406616156.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81452072 + ... + 81452079.

It is an arithmetic number, because the mean of its divisors is an integer number (190054844).

Almost surely, 2^651616604 is an apocalyptic number.

It is an amenable number.

651616604 is a deficient number, since it is larger than the sum of its proper divisors (488712460).

651616604 is a wasteful number, since it uses less digits than its factorization.

651616604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162904155 (or 162904153 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 651616604 is about 25526.7820925396. The cubic root of 651616604 is about 866.9566470138.

The spelling of 651616604 in words is "six hundred fifty-one million, six hundred sixteen thousand, six hundred four".