612161262531 has 80 divisors (see below), whose sum is σ = 1161799733248. Its totient is φ = 312482059200.

The previous prime is 612161262491. The next prime is 612161262569. The reversal of 612161262531 is 135262161216.

612161262531 is a `hidden beast` number, since 6 + 1 + 2 + 1 + 61 + 2 + 62 + 531 = 666.

It is not a de Polignac number, because 612161262531 - 2⁹ = 612161262019 is a prime.

It is a super-2 number, since 2×612161262531² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (612161262571) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1111015 + ... + 1568016.

Almost surely, 2^612161262531 is an apocalyptic number.

612161262531 is a deficient number, since it is larger than the sum of its proper divisors (549638470717).

612161262531 is a wasteful number, since it uses less digits than its factorization.

612161262531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2679094 (or 2679085 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The spelling of 612161262531 in words is "six hundred twelve billion, one hundred sixty-one million, two hundred sixty-two thousand, five hundred thirty-one".