61536250057 has 4 divisors (see below), whose sum is σ = 64775000080. Its totient is φ = 58297500036.

The previous prime is 61536250043. The next prime is 61536250073. The reversal of 61536250057 is 75005263516.

61536250057 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 cyclic number.

It is not a de Polignac number, because 61536250057 - 2¹⁵ = 61536217289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61536250357) 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, 1619374983 + ... + 1619375020.

It is an arithmetic number, because the mean of its divisors is an integer number (16193750020).

Almost surely, 2^61536250057 is an apocalyptic number.

It is an amenable number.

61536250057 is a deficient number, since it is larger than the sum of its proper divisors (3238750023).

61536250057 is a wasteful number, since it uses less digits than its factorization.

61536250057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3238750022.

The product of its (nonzero) digits is 189000, while the sum is 40.

The spelling of 61536250057 in words is "sixty-one billion, five hundred thirty-six million, two hundred fifty thousand, fifty-seven".