651264870 has 32 divisors (see below), whose sum is σ = 1572636672. Its totient is φ = 172603872.

The previous prime is 651264847. The next prime is 651264877. The reversal of 651264870 is 78462156.

It is a super-2 number, since 2×651264870² = 848291861792233800, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651264877) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61702 + ... + 71481.

It is an arithmetic number, because the mean of its divisors is an integer number (49144896).

Almost surely, 2^651264870 is an apocalyptic number.

651264870 is an abundant number, since it is smaller than the sum of its proper divisors (921371802).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

651264870 is a wasteful number, since it uses less digits than its factorization.

651264870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133356.

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 651264870 is about 25519.8916533750. The cubic root of 651264870 is about 866.8006283719.

It can be divided in two parts, 65126 and 4870, that added together give a palindrome (69996).

The spelling of 651264870 in words is "six hundred fifty-one million, two hundred sixty-four thousand, eight hundred seventy".