61156795391 has 4 divisors (see below), whose sum is σ = 61161308784. Its totient is φ = 61152282000.

The previous prime is 61156795363. The next prime is 61156795409. The reversal of 61156795391 is 19359765116.

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

It is a cyclic number.

It is not a de Polignac number, because 61156795391 - 2²⁶ = 61089686527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61156795331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2236310 + ... + 2263491.

It is an arithmetic number, because the mean of its divisors is an integer number (15290327196).

Almost surely, 2^61156795391 is an apocalyptic number.

61156795391 is a deficient number, since it is larger than the sum of its proper divisors (4513393).

61156795391 is a wasteful number, since it uses less digits than its factorization.

61156795391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4513392.

The product of its digits is 1530900, while the sum is 53.

The spelling of 61156795391 in words is "sixty-one billion, one hundred fifty-six million, seven hundred ninety-five thousand, three hundred ninety-one".