696551638 has 32 divisors (see below), whose sum is σ = 1097712000. Its totient is φ = 331067520.

The previous prime is 696551633. The next prime is 696551641. The reversal of 696551638 is 836155696.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 696551591 and 696551600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (696551633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1510728 + ... + 1511188.

It is an arithmetic number, because the mean of its divisors is an integer number (34303500).

Almost surely, 2^696551638 is an apocalyptic number.

696551638 is a deficient number, since it is larger than the sum of its proper divisors (401160362).

696551638 is a wasteful number, since it uses less digits than its factorization.

696551638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840.

The product of its digits is 1166400, while the sum is 49.

The square root of 696551638 is about 26392.2647379872. The cubic root of 696551638 is about 886.4435941426.

The spelling of 696551638 in words is "six hundred ninety-six million, five hundred fifty-one thousand, six hundred thirty-eight".