691861012463460 has 48 divisors (see below), whose sum is σ = 2213955239884416. Its totient is φ = 158139659991552.

The previous prime is 691861012463429. The next prime is 691861012463531. The reversal of 691861012463460 is 64364210168196.

It is a self number, because there is not a number n which added to its sum of digits gives 691861012463460.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 823644062037 + ... + 823644062876.

It is an arithmetic number, because the mean of its divisors is an integer number (46124067497592).

Almost surely, 2^{691861012463460} is an apocalyptic number.

691861012463460 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

691861012463460 is an abundant number, since it is smaller than the sum of its proper divisors (1522094227420956).

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

691861012463460 is a wasteful number, since it uses less digits than its factorization.

691861012463460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1647288124932 (or 1647288124930 counting only the distinct ones).

The product of its (nonzero) digits is 8957952, while the sum is 57.

The spelling of 691861012463460 in words is "six hundred ninety-one trillion, eight hundred sixty-one billion, twelve million, four hundred sixty-three thousand, four hundred sixty".