61156265531 has 8 divisors (see below), whose sum is σ = 61853065728. Its totient is φ = 60463305000.

The previous prime is 61156265503. The next prime is 61156265537. The reversal of 61156265531 is 13556265116.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61156265531 is a prime.

It is a super-2 number, since 2×61156265531² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61156265537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 927875 + ... + 991596.

It is an arithmetic number, because the mean of its divisors is an integer number (7731633216).

Almost surely, 2^61156265531 is an apocalyptic number.

61156265531 is a deficient number, since it is larger than the sum of its proper divisors (696800197).

61156265531 is a wasteful number, since it uses less digits than its factorization.

61156265531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1919833.

The product of its digits is 162000, while the sum is 41.

The spelling of 61156265531 in words is "sixty-one billion, one hundred fifty-six million, two hundred sixty-five thousand, five hundred thirty-one".