651239045 has 8 divisors (see below), whose sum is σ = 786167424. Its totient is φ = 517870864.

The previous prime is 651239021. The next prime is 651239081. The reversal of 651239045 is 540932156.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 651239045 - 2⁸ = 651238789 is a prime.

It is a super-2 number, since 2×651239045² = 848224587465024050, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 651238996 and 651239014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 389129 + ... + 390798.

It is an arithmetic number, because the mean of its divisors is an integer number (98270928).

Almost surely, 2^651239045 is an apocalyptic number.

It is an amenable number.

651239045 is a deficient number, since it is larger than the sum of its proper divisors (134928379).

651239045 is a wasteful number, since it uses less digits than its factorization.

651239045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780099.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 651239045 is about 25519.3856705055. The cubic root of 651239045 is about 866.7891709638.

The spelling of 651239045 in words is "six hundred fifty-one million, two hundred thirty-nine thousand, forty-five".