61715570157057 has 16 divisors (see below), whose sum is σ = 86778451968320. Its totient is φ = 38906206286400.

The previous prime is 61715570157037. The next prime is 61715570157067. The reversal of 61715570157057 is 75075107551716.

It is not a de Polignac number, because 61715570157057 - 2⁶ = 61715570156993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61715570156988 and 61715570157006.

It is not an unprimeable number, because it can be changed into a prime (61715570157037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1000643194 + ... + 1000704867.

It is an arithmetic number, because the mean of its divisors is an integer number (5423653248020).

Almost surely, 2^{61715570157057} is an apocalyptic number.

It is an amenable number.

61715570157057 is a deficient number, since it is larger than the sum of its proper divisors (25062881811263).

61715570157057 is a wasteful number, since it uses less digits than its factorization.

61715570157057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2001348624.

The product of its (nonzero) digits is 9003750, while the sum is 57.

The spelling of 61715570157057 in words is "sixty-one trillion, seven hundred fifteen billion, five hundred seventy million, one hundred fifty-seven thousand, fifty-seven".