690498817564 has 6 divisors (see below), whose sum is σ = 1208372930744. Its totient is φ = 345249408780.

The previous prime is 690498817529. The next prime is 690498817597. The reversal of 690498817564 is 465718894096.

It is a happy number.

690498817564 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 690498817564.

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, 86312352192 + ... + 86312352199.

Almost surely, 2^690498817564 is an apocalyptic number.

It is an amenable number.

690498817564 is a deficient number, since it is larger than the sum of its proper divisors (517874113180).

690498817564 is a wasteful number, since it uses less digits than its factorization.

690498817564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172624704395 (or 172624704393 counting only the distinct ones).

The product of its (nonzero) digits is 104509440, while the sum is 67.

The spelling of 690498817564 in words is "six hundred ninety billion, four hundred ninety-eight million, eight hundred seventeen thousand, five hundred sixty-four".