1161717157215 has 24 divisors (see below), whose sum is σ = 2013670870848. Its totient is φ = 619573930560.

The previous prime is 1161717157207. The next prime is 1161717157229. The reversal of 1161717157215 is 5127517171611.

1161717157215 is a `hidden beast` number, since 1 + 1 + 6 + 1 + 7 + 1 + 71 + 572 + 1 + 5 = 666.

It is not a de Polignac number, because 1161717157215 - 2³ = 1161717157207 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, 4423722 + ... + 4678968.

It is an arithmetic number, because the mean of its divisors is an integer number (83902952952).

Almost surely, 2^{1161717157215} is an apocalyptic number.

1161717157215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1161717157215 is a deficient number, since it is larger than the sum of its proper divisors (851953713633).

1161717157215 is a wasteful number, since it uses less digits than its factorization.

1161717157215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356399 (or 356396 counting only the distinct ones).

The product of its digits is 102900, while the sum is 45.

The spelling of 1161717157215 in words is "one trillion, one hundred sixty-one billion, seven hundred seventeen million, one hundred fifty-seven thousand, two hundred fifteen".