191012297694 has 64 divisors (see below), whose sum is σ = 416692531200. Its totient is φ = 58170988512.

The previous prime is 191012297659. The next prime is 191012297731. The reversal of 191012297694 is 496792210191.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 140637 + ... + 633879.

It is an arithmetic number, because the mean of its divisors is an integer number (6510820800).

Almost surely, 2^191012297694 is an apocalyptic number.

191012297694 is an abundant number, since it is smaller than the sum of its proper divisors (225680233506).

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

191012297694 is a wasteful number, since it uses less digits than its factorization.

191012297694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493389.

The product of its (nonzero) digits is 489888, while the sum is 51.

The spelling of 191012297694 in words is "one hundred ninety-one billion, twelve million, two hundred ninety-seven thousand, six hundred ninety-four".