64796531 has 4 divisors (see below), whose sum is σ = 64950864. Its totient is φ = 64642200.

The previous prime is 64796521. The next prime is 64796533. The reversal of 64796531 is 13569746.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64796531 - 2¹⁸ = 64534387 is a prime.

It is a super-2 number, since 2×64796531² = 8397180859267922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64796533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76535 + ... + 77376.

It is an arithmetic number, because the mean of its divisors is an integer number (16237716).

Almost surely, 2^64796531 is an apocalyptic number.

64796531 is a deficient number, since it is larger than the sum of its proper divisors (154333).

64796531 is a wasteful number, since it uses less digits than its factorization.

64796531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154332.

The product of its digits is 136080, while the sum is 41.

The square root of 64796531 is about 8049.6292461206. The cubic root of 64796531 is about 401.6526024433.

The spelling of 64796531 in words is "sixty-four million, seven hundred ninety-six thousand, five hundred thirty-one".