691340420592 has 60 divisors (see below), whose sum is σ = 2001509994120. Its totient is φ = 222500363904.

The previous prime is 691340420591. The next prime is 691340420599. The reversal of 691340420592 is 295024043196.

691340420592 is a `hidden beast` number, since 6 + 9 + 1 + 34 + 0 + 4 + 20 + 592 = 666.

691340420592 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (691340420591) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 82771258 + ... + 82779609.

It is an arithmetic number, because the mean of its divisors is an integer number (33358499902).

Almost surely, 2^691340420592 is an apocalyptic number.

It is an amenable number.

691340420592 is an abundant number, since it is smaller than the sum of its proper divisors (1310169573528).

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

691340420592 is a wasteful number, since it uses less digits than its factorization.

691340420592 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165550910 (or 165550901 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The spelling of 691340420592 in words is "six hundred ninety-one billion, three hundred forty million, four hundred twenty thousand, five hundred ninety-two".