690813493812 has 288 divisors, whose sum is σ = 2033972921344. Its totient is φ = 203569459200.

The previous prime is 690813493763. The next prime is 690813493817. The reversal of 690813493812 is 218394318096.

690813493812 is a `hidden beast` number, since 69 + 0 + 8 + 13 + 493 + 81 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690813493817) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 37987362 + ... + 38005542.

Almost surely, 2^690813493812 is an apocalyptic number.

690813493812 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 690813493812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1016986460672).

690813493812 is an abundant number, since it is smaller than the sum of its proper divisors (1343159427532).

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

690813493812 is a wasteful number, since it uses less digits than its factorization.

690813493812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18341 (or 18327 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 54.

The spelling of 690813493812 in words is "six hundred ninety billion, eight hundred thirteen million, four hundred ninety-three thousand, eight hundred twelve".