191364516 has 72 divisors (see below), whose sum is σ = 554159424. Its totient is φ = 54544320.

The previous prime is 191364499. The next prime is 191364517. The reversal of 191364516 is 615463191.

191364516 is a `hidden beast` number, since 1 + 9 + 1 + 3 + 645 + 1 + 6 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (191364517) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 161446 + ... + 162626.

Almost surely, 2^191364516 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 191364516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (277079712).

191364516 is an abundant number, since it is smaller than the sum of its proper divisors (362794908).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

191364516 is a wasteful number, since it uses less digits than its factorization.

191364516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1841 (or 1836 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 191364516 is about 13833.4564010590. The cubic root of 191364516 is about 576.2626478685.

The spelling of 191364516 in words is "one hundred ninety-one million, three hundred sixty-four thousand, five hundred sixteen".