764240005531 has 16 divisors (see below), whose sum is σ = 837419869440. Its totient is φ = 694215244800.

The previous prime is 764240005517. The next prime is 764240005561. The reversal of 764240005531 is 135500042467.

It is a cyclic number.

It is not a de Polignac number, because 764240005531 - 2⁵ = 764240005499 is a prime.

It is a super-2 number, since 2×764240005531² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (764240005511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 994006 + ... + 1586356.

It is an arithmetic number, because the mean of its divisors is an integer number (52338741840).

Almost surely, 2^764240005531 is an apocalyptic number.

764240005531 is a deficient number, since it is larger than the sum of its proper divisors (73179863909).

764240005531 is a wasteful number, since it uses less digits than its factorization.

764240005531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595014.

The product of its (nonzero) digits is 100800, while the sum is 37.

Adding to 764240005531 its reverse (135500042467), we get a palindrome (899740047998).

The spelling of 764240005531 in words is "seven hundred sixty-four billion, two hundred forty million, five thousand, five hundred thirty-one".