690798195972 has 36 divisors (see below), whose sum is σ = 1838088768880. Its totient is φ = 218146798512.

The previous prime is 690798195937. The next prime is 690798195977. The reversal of 690798195972 is 279591897096.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 690798195972.

It is not an unprimeable number, because it can be changed into a prime (690798195977) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 504968758 + ... + 504970125.

Almost surely, 2^690798195972 is an apocalyptic number.

It is an amenable number.

690798195972 is an abundant number, since it is smaller than the sum of its proper divisors (1147290572908).

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

690798195972 is a wasteful number, since it uses less digits than its factorization.

690798195972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009938912 (or 1009938907 counting only the distinct ones).

The product of its (nonzero) digits is 154314720, while the sum is 72.

The spelling of 690798195972 in words is "six hundred ninety billion, seven hundred ninety-eight million, one hundred ninety-five thousand, nine hundred seventy-two".