612115531261 has 4 divisors (see below), whose sum is σ = 659201341372. Its totient is φ = 565029721152.

The previous prime is 612115531211. The next prime is 612115531283. The reversal of 612115531261 is 162135511216.

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

It can be written as a sum of positive squares in 2 ways, for example, as 49720526361 + 562395004900 = 222981^2 + 749930^2 .

It is not a de Polignac number, because 612115531261 - 2¹¹ = 612115529213 is a prime.

It is a super-2 number, since 2×612115531261² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612115531211) 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 3 ways as a sum of consecutive naturals, for example, 23542905036 + ... + 23542905061.

It is an arithmetic number, because the mean of its divisors is an integer number (164800335343).

Almost surely, 2^612115531261 is an apocalyptic number.

It is an amenable number.

612115531261 is a deficient number, since it is larger than the sum of its proper divisors (47085810111).

612115531261 is a wasteful number, since it uses less digits than its factorization.

612115531261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47085810110.

The product of its digits is 10800, while the sum is 34.

The spelling of 612115531261 in words is "six hundred twelve billion, one hundred fifteen million, five hundred thirty-one thousand, two hundred sixty-one".