115661151661057 has 4 divisors (see below), whose sum is σ = 116069848310320. Its totient is φ = 115252455011796.

The previous prime is 115661151661049. The next prime is 115661151661123. The reversal of 115661151661057 is 750166151166511.

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 115661151661057 - 2³ = 115661151661049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 115661151660995 and 115661151661013.

It is not an unprimeable number, because it can be changed into a prime (115661151661037) 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, 204348324207 + ... + 204348324772.

It is an arithmetic number, because the mean of its divisors is an integer number (29017462077580).

Almost surely, 2^{115661151661057} is an apocalyptic number.

It is an amenable number.

115661151661057 is a deficient number, since it is larger than the sum of its proper divisors (408696649263).

115661151661057 is an equidigital number, since it uses as much as digits as its factorization.

115661151661057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408696649262.

The product of its (nonzero) digits is 1134000, while the sum is 52.

The spelling of 115661151661057 in words is "one hundred fifteen trillion, six hundred sixty-one billion, one hundred fifty-one million, six hundred sixty-one thousand, fifty-seven".