115505606661651 has 48 divisors (see below), whose sum is σ = 173707227133440. Its totient is φ = 76698372385440.

The previous prime is 115505606661647. The next prime is 115505606661721. The reversal of 115505606661651 is 156166606505511.

It is not a de Polignac number, because 115505606661651 - 2² = 115505606661647 is a prime.

It is not an unprimeable number, because it can be changed into a prime (115505606661451) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 239661745 + ... + 240143213.

It is an arithmetic number, because the mean of its divisors is an integer number (3618900565280).

Almost surely, 2^{115505606661651} is an apocalyptic number.

115505606661651 is a deficient number, since it is larger than the sum of its proper divisors (58201620471789).

115505606661651 is an equidigital number, since it uses as much as digits as its factorization.

115505606661651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485398 (or 485386 counting only the distinct ones).

The product of its (nonzero) digits is 4860000, while the sum is 54.

The spelling of 115505606661651 in words is "one hundred fifteen trillion, five hundred five billion, six hundred six million, six hundred sixty-one thousand, six hundred fifty-one".