690778654475 has 96 divisors (see below), whose sum is σ = 1061412065280. Its totient is φ = 434274048000.

The previous prime is 690778654439. The next prime is 690778654481. The reversal of 690778654475 is 574456877096.

It is a happy number.

690778654475 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 690778654475 - 2¹² = 690778650379 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 221330915 + ... + 221334035.

It is an arithmetic number, because the mean of its divisors is an integer number (11056375680).

Almost surely, 2^690778654475 is an apocalyptic number.

690778654475 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

690778654475 is a deficient number, since it is larger than the sum of its proper divisors (370633410805).

690778654475 is a wasteful number, since it uses less digits than its factorization.

690778654475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3781 (or 3776 counting only the distinct ones).

The product of its (nonzero) digits is 355622400, while the sum is 68.

The spelling of 690778654475 in words is "six hundred ninety billion, seven hundred seventy-eight million, six hundred fifty-four thousand, four hundred seventy-five".