691220258134 has 32 divisors (see below), whose sum is σ = 1253226297600. Its totient is φ = 279315721440.

The previous prime is 691220258117. The next prime is 691220258147. The reversal of 691220258134 is 431852022196.

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, 6101629 + ... + 6213880.

It is an arithmetic number, because the mean of its divisors is an integer number (39163321800).

Almost surely, 2^691220258134 is an apocalyptic number.

691220258134 is a deficient number, since it is larger than the sum of its proper divisors (562006039466).

691220258134 is a wasteful number, since it uses less digits than its factorization.

691220258134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12315748.

The product of its (nonzero) digits is 207360, while the sum is 43.

The spelling of 691220258134 in words is "six hundred ninety-one billion, two hundred twenty million, two hundred fifty-eight thousand, one hundred thirty-four".