264003678531 has 24 divisors (see below), whose sum is σ = 406907875920. Its totient is φ = 164455059456.

The previous prime is 264003678529. The next prime is 264003678559. The reversal of 264003678531 is 135876300462.

264003678531 is a `hidden beast` number, since 2 + 6 + 40 + 0 + 3 + 6 + 78 + 531 = 666.

It is not a de Polignac number, because 264003678531 - 2¹ = 264003678529 is a prime.

It is a super-2 number, since 2×264003678531² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (264003678931) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10562046 + ... + 10587011.

It is an arithmetic number, because the mean of its divisors is an integer number (16954494830).

Almost surely, 2^264003678531 is an apocalyptic number.

264003678531 is a deficient number, since it is larger than the sum of its proper divisors (142904197389).

264003678531 is a wasteful number, since it uses less digits than its factorization.

264003678531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21149155 (or 21149152 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

Adding to 264003678531 its reverse (135876300462), we get a palindrome (399879978993).

The spelling of 264003678531 in words is "two hundred sixty-four billion, three million, six hundred seventy-eight thousand, five hundred thirty-one".