651012791 has 12 divisors (see below), whose sum is σ = 770622216. Its totient is φ = 546303120.

The previous prime is 651012787. The next prime is 651012799. The reversal of 651012791 is 197210156.

It is not a de Polignac number, because 651012791 - 2² = 651012787 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651012799) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 205361 + ... + 208506.

It is an arithmetic number, because the mean of its divisors is an integer number (64218518).

Almost surely, 2^651012791 is an apocalyptic number.

651012791 is a deficient number, since it is larger than the sum of its proper divisors (119609425).

651012791 is a wasteful number, since it uses less digits than its factorization.

651012791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413902 (or 413891 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 32.

The square root of 651012791 is about 25514.9523025225. The cubic root of 651012791 is about 866.6887791367.

The spelling of 651012791 in words is "six hundred fifty-one million, twelve thousand, seven hundred ninety-one".