690288206678 has 24 divisors (see below), whose sum is σ = 1208593395072. Its totient is φ = 294828105264.

The previous prime is 690288206677. The next prime is 690288206723. The reversal of 690288206678 is 876602882096.

It is a self number, because there is not a number n which added to its sum of digits gives 690288206678.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690288206677) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11991350 + ... + 12048777.

It is an arithmetic number, because the mean of its divisors is an integer number (50358058128).

Almost surely, 2^690288206678 is an apocalyptic number.

690288206678 is a deficient number, since it is larger than the sum of its proper divisors (518305188394).

690288206678 is a wasteful number, since it uses less digits than its factorization.

690288206678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24040436 (or 24040429 counting only the distinct ones).

The product of its (nonzero) digits is 27869184, while the sum is 62.

The spelling of 690288206678 in words is "six hundred ninety billion, two hundred eighty-eight million, two hundred six thousand, six hundred seventy-eight".