651140605 has 4 divisors (see below), whose sum is σ = 781368732. Its totient is φ = 520912480.

The previous prime is 651140591. The next prime is 651140641. The reversal of 651140605 is 506041156.

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 398521369 + 252619236 = 19963^2 + 15894^2 .

It is not a de Polignac number, because 651140605 - 2⁵ = 651140573 is a prime.

It is a Duffinian number.

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, 65114056 + ... + 65114065.

It is an arithmetic number, because the mean of its divisors is an integer number (195342183).

Almost surely, 2^651140605 is an apocalyptic number.

It is an amenable number.

651140605 is a deficient number, since it is larger than the sum of its proper divisors (130228127).

651140605 is a wasteful number, since it uses less digits than its factorization.

651140605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130228126.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 651140605 is about 25517.4568677993. The cubic root of 651140605 is about 866.7454947201.

The spelling of 651140605 in words is "six hundred fifty-one million, one hundred forty thousand, six hundred five".