191861114715 has 12 divisors (see below), whose sum is σ = 332559265584. Its totient is φ = 102325927824.

The previous prime is 191861114651. The next prime is 191861114729. The reversal of 191861114715 is 517411168191.

191861114715 is a `hidden beast` number, since 1 + 9 + 1 + 8 + 611 + 14 + 7 + 15 = 666.

It is not a de Polignac number, because 191861114715 - 2⁶ = 191861114651 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 4263580327 = 191861114715 / (1 + 9 + 1 + 8 + 6 + 1 + 1 + 1 + 4 + 7 + 1 + 5).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2131790119 + ... + 2131790208.

It is an arithmetic number, because the mean of its divisors is an integer number (27713272132).

Almost surely, 2^191861114715 is an apocalyptic number.

191861114715 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

191861114715 is a deficient number, since it is larger than the sum of its proper divisors (140698150869).

191861114715 is a wasteful number, since it uses less digits than its factorization.

191861114715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4263580338 (or 4263580335 counting only the distinct ones).

The product of its digits is 60480, while the sum is 45.

The spelling of 191861114715 in words is "one hundred ninety-one billion, eight hundred sixty-one million, one hundred fourteen thousand, seven hundred fifteen".