690778654476 has 48 divisors (see below), whose sum is σ = 1624155993600. Its totient is φ = 228499948800.

The previous prime is 690778654439. The next prime is 690778654481. The reversal of 690778654476 is 674456877096.

It is a self number, because there is not a number n which added to its sum of digits gives 690778654476.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1575225 + ... + 1965423.

It is an arithmetic number, because the mean of its divisors is an integer number (33836583200).

Almost surely, 2^690778654476 is an apocalyptic number.

It is an amenable number.

690778654476 is an abundant number, since it is smaller than the sum of its proper divisors (933377339124).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

690778654476 is a wasteful number, since it uses less digits than its factorization.

690778654476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391334 (or 391332 counting only the distinct ones).

The product of its (nonzero) digits is 426746880, while the sum is 69.

The spelling of 690778654476 in words is "six hundred ninety billion, seven hundred seventy-eight million, six hundred fifty-four thousand, four hundred seventy-six".