691023372488 has 32 divisors (see below), whose sum is σ = 1374166244160. Its totient is φ = 325071574080.

The previous prime is 691023372367. The next prime is 691023372503. The reversal of 691023372488 is 884273320196.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30772070 + ... + 30794517.

It is an arithmetic number, because the mean of its divisors is an integer number (42942695130).

Almost surely, 2^691023372488 is an apocalyptic number.

It is an amenable number.

691023372488 is a deficient number, since it is larger than the sum of its proper divisors (683142871672).

691023372488 is a wasteful number, since it uses less digits than its factorization.

691023372488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61566677 (or 61566673 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 53.

The spelling of 691023372488 in words is "six hundred ninety-one billion, twenty-three million, three hundred seventy-two thousand, four hundred eighty-eight".