691877633901 has 8 divisors (see below), whose sum is σ = 922969666080. Its totient is φ = 461018678832.

The previous prime is 691877633869. The next prime is 691877633917. The reversal of 691877633901 is 109336778196.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 691877633901 - 2⁵ = 691877633869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (691877633101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58262350 + ... + 58274223.

It is an arithmetic number, because the mean of its divisors is an integer number (115371208260).

Almost surely, 2^691877633901 is an apocalyptic number.

It is an amenable number.

691877633901 is a deficient number, since it is larger than the sum of its proper divisors (231092032179).

691877633901 is a wasteful number, since it uses less digits than its factorization.

691877633901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116538555.

The product of its (nonzero) digits is 10287648, while the sum is 60.

The spelling of 691877633901 in words is "six hundred ninety-one billion, eight hundred seventy-seven million, six hundred thirty-three thousand, nine hundred one".