691407463786 has 32 divisors (see below), whose sum is σ = 1137304058688. Its totient is φ = 313331047680.

The previous prime is 691407463783. The next prime is 691407463787. The reversal of 691407463786 is 687364704196.

It is not an unprimeable number, because it can be changed into a prime (691407463783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 785320 + ... + 1414051.

It is an arithmetic number, because the mean of its divisors is an integer number (35540751834).

Almost surely, 2^691407463786 is an apocalyptic number.

691407463786 is a deficient number, since it is larger than the sum of its proper divisors (445896594902).

691407463786 is a wasteful number, since it uses less digits than its factorization.

691407463786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2199606.

The product of its (nonzero) digits is 36578304, while the sum is 61.

The spelling of 691407463786 in words is "six hundred ninety-one billion, four hundred seven million, four hundred sixty-three thousand, seven hundred eighty-six".