125553802665 has 16 divisors (see below), whose sum is σ = 203637950208. Its totient is φ = 66044739456.

The previous prime is 125553802643. The next prime is 125553802667. The reversal of 125553802665 is 566208355521.

It is not a de Polignac number, because 125553802665 - 2¹² = 125553798569 is a prime.

It is a super-2 number, since 2×125553802665² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (125553802667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57329409 + ... + 57331598.

It is an arithmetic number, because the mean of its divisors is an integer number (12727371888).

Almost surely, 2^125553802665 is an apocalyptic number.

125553802665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

125553802665 is a deficient number, since it is larger than the sum of its proper divisors (78084147543).

125553802665 is a wasteful number, since it uses less digits than its factorization.

125553802665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114661088.

The product of its (nonzero) digits is 2160000, while the sum is 48.

The spelling of 125553802665 in words is "one hundred twenty-five billion, five hundred fifty-three million, eight hundred two thousand, six hundred sixty-five".