115656215401 has 4 divisors (see below), whose sum is σ = 116324748612. Its totient is φ = 114987682192.

The previous prime is 115656215357. The next prime is 115656215453. The reversal of 115656215401 is 104512656511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 104512656511 = 22751 ⋅4593761.

It can be written as a sum of positive squares in 2 ways, for example, as 58516093801 + 57140121600 = 241901^2 + 239040^2 .

It is a cyclic number.

It is not a de Polignac number, because 115656215401 - 2¹³ = 115656207209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115656213401) 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, 334266346 + ... + 334266691.

It is an arithmetic number, because the mean of its divisors is an integer number (29081187153).

Almost surely, 2^115656215401 is an apocalyptic number.

It is an amenable number.

115656215401 is a deficient number, since it is larger than the sum of its proper divisors (668533211).

115656215401 is an equidigital number, since it uses as much as digits as its factorization.

115656215401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668533210.

The product of its (nonzero) digits is 36000, while the sum is 37.

The spelling of 115656215401 in words is "one hundred fifteen billion, six hundred fifty-six million, two hundred fifteen thousand, four hundred one".