61057042113 has 4 divisors (see below), whose sum is σ = 81409389488. Its totient is φ = 40704694740.

The previous prime is 61057042091. The next prime is 61057042147. The reversal of 61057042113 is 31124075016.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-61057042113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61057042513) 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, 10176173683 + ... + 10176173688.

It is an arithmetic number, because the mean of its divisors is an integer number (20352347372).

Almost surely, 2^61057042113 is an apocalyptic number.

It is an amenable number.

61057042113 is a deficient number, since it is larger than the sum of its proper divisors (20352347375).

61057042113 is a wasteful number, since it uses less digits than its factorization.

61057042113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20352347374.

The product of its (nonzero) digits is 5040, while the sum is 30.

The spelling of 61057042113 in words is "sixty-one billion, fifty-seven million, forty-two thousand, one hundred thirteen".