651751064 has 8 divisors (see below), whose sum is σ = 1222033260. Its totient is φ = 325875528.

The previous prime is 651751063. The next prime is 651751073. The reversal of 651751064 is 460157156.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651751063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40734434 + ... + 40734449.

Almost surely, 2^651751064 is an apocalyptic number.

It is an amenable number.

651751064 is a deficient number, since it is larger than the sum of its proper divisors (570282196).

651751064 is a wasteful number, since it uses less digits than its factorization.

651751064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81468889 (or 81468885 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 651751064 is about 25529.4156611545. The cubic root of 651751064 is about 867.0162745990.

The spelling of 651751064 in words is "six hundred fifty-one million, seven hundred fifty-one thousand, sixty-four".