7264161621531 has 6 divisors (see below), whose sum is σ = 10492677897780. Its totient is φ = 4842774414348.

The previous prime is 7264161621529. The next prime is 7264161621551. The reversal of 7264161621531 is 1351261614627.

It is a happy number.

7264161621531 is a `hidden beast` number, since 7 + 2 + 6 + 4 + 1 + 616 + 21 + 5 + 3 + 1 = 666.

It is not a de Polignac number, because 7264161621531 - 2¹ = 7264161621529 is a prime.

It is a super-2 number, since 2×7264161621531² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7264161621551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 403564534521 + ... + 403564534538.

It is an arithmetic number, because the mean of its divisors is an integer number (1748779649630).

Almost surely, 2^{7264161621531} is an apocalyptic number.

7264161621531 is a deficient number, since it is larger than the sum of its proper divisors (3228516276249).

7264161621531 is a wasteful number, since it uses less digits than its factorization.

7264161621531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807129069065 (or 807129069062 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The spelling of 7264161621531 in words is "seven trillion, two hundred sixty-four billion, one hundred sixty-one million, six hundred twenty-one thousand, five hundred thirty-one".