691319094125 has 16 divisors (see below), whose sum is σ = 941199524928. Its totient is φ = 502777522000.

The previous prime is 691319094107. The next prime is 691319094143. The reversal of 691319094125 is 521490913196.

It is an interprime number because it is at equal distance from previous prime (691319094107) and next prime (691319094143).

It is not a de Polignac number, because 691319094125 - 2⁶ = 691319094061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 251387387 + ... + 251390136.

It is an arithmetic number, because the mean of its divisors is an integer number (58824970308).

Almost surely, 2^691319094125 is an apocalyptic number.

It is an amenable number.

691319094125 is a deficient number, since it is larger than the sum of its proper divisors (249880430803).

691319094125 is a wasteful number, since it uses less digits than its factorization.

691319094125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502777549 (or 502777539 counting only the distinct ones).

The product of its (nonzero) digits is 524880, while the sum is 50.

The spelling of 691319094125 in words is "six hundred ninety-one billion, three hundred nineteen million, ninety-four thousand, one hundred twenty-five".