117628215525 has 24 divisors (see below), whose sum is σ = 216087389760. Its totient is φ = 62735047920.

The previous prime is 117628215511. The next prime is 117628215533. The reversal of 117628215525 is 525512826711.

It is a happy number.

117628215525 is a `hidden beast` number, since 1 + 1 + 7 + 628 + 2 + 15 + 5 + 2 + 5 = 666.

It is not a de Polignac number, because 117628215525 - 2⁸ = 117628215269 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 87131337 + ... + 87132686.

It is an arithmetic number, because the mean of its divisors is an integer number (9003641240).

Almost surely, 2^117628215525 is an apocalyptic number.

117628215525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

117628215525 is a deficient number, since it is larger than the sum of its proper divisors (98459174235).

117628215525 is a wasteful number, since it uses less digits than its factorization.

117628215525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174264042 (or 174264031 counting only the distinct ones).

The product of its digits is 336000, while the sum is 45.

The spelling of 117628215525 in words is "one hundred seventeen billion, six hundred twenty-eight million, two hundred fifteen thousand, five hundred twenty-five".