691273913642 has 16 divisors (see below), whose sum is σ = 1117111091712. Its totient is φ = 318924399600.

The previous prime is 691273913549. The next prime is 691273913677. The reversal of 691273913642 is 246319372196.

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, 5144858 + ... + 5277509.

It is an arithmetic number, because the mean of its divisors is an integer number (69819443232).

Almost surely, 2^691273913642 is an apocalyptic number.

691273913642 is a deficient number, since it is larger than the sum of its proper divisors (425837178070).

691273913642 is a wasteful number, since it uses less digits than its factorization.

691273913642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10424933.

The product of its digits is 2939328, while the sum is 53.

The spelling of 691273913642 in words is "six hundred ninety-one billion, two hundred seventy-three million, nine hundred thirteen thousand, six hundred forty-two".