64131370 has 16 divisors (see below), whose sum is σ = 115528968. Its totient is φ = 25632000.

The previous prime is 64131367. The next prime is 64131427. The reversal of 64131370 is 7313146.

It can be written as a sum of positive squares in 4 ways, for example, as 35605089 + 28526281 = 5967^2 + 5341^2 .

It is a super-2 number, since 2×64131370² = 8225665236153800, which contains 22 as substring.

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, 19870 + ... + 22870.

Almost surely, 2^64131370 is an apocalyptic number.

64131370 is a deficient number, since it is larger than the sum of its proper divisors (51397598).

64131370 is a wasteful number, since it uses less digits than its factorization.

64131370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5145.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 64131370 is about 8008.2064159211. The cubic root of 64131370 is about 400.2735004511.

The spelling of 64131370 in words is "sixty-four million, one hundred thirty-one thousand, three hundred seventy".