693785393816 has 8 divisors (see below), whose sum is σ = 1300847613420. Its totient is φ = 346892696904.

The previous prime is 693785393771. The next prime is 693785393887. The reversal of 693785393816 is 618393587396.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×693785393816² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43361587106 + ... + 43361587121.

Almost surely, 2^693785393816 is an apocalyptic number.

It is an amenable number.

693785393816 is a deficient number, since it is larger than the sum of its proper divisors (607062219604).

693785393816 is a wasteful number, since it uses less digits than its factorization.

693785393816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86723174233 (or 86723174229 counting only the distinct ones).

The product of its digits is 176359680, while the sum is 68.

The spelling of 693785393816 in words is "six hundred ninety-three billion, seven hundred eighty-five million, three hundred ninety-three thousand, eight hundred sixteen".