690459802233921 has 32 divisors (see below), whose sum is σ = 1076742306240000. Its totient is φ = 436079116163664.

The previous prime is 690459802233869. The next prime is 690459802233973. The reversal of 690459802233921 is 129332208954096.

690459802233921 is a `hidden beast` number, since 6 + 9 + 0 + 4 + 598 + 0 + 2 + 2 + 3 + 39 + 2 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (690459802233869) and next prime (690459802233973).

It is not a de Polignac number, because 690459802233921 - 2⁴³ = 681663709211713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (690459802033921) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 517814530 + ... + 519146228.

It is an arithmetic number, because the mean of its divisors is an integer number (33648197070000).

Almost surely, 2^{690459802233921} is an apocalyptic number.

It is an amenable number.

690459802233921 is a deficient number, since it is larger than the sum of its proper divisors (386282504006079).

690459802233921 is a wasteful number, since it uses less digits than its factorization.

690459802233921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2342410 (or 2342404 counting only the distinct ones).

The product of its (nonzero) digits is 50388480, while the sum is 63.

The spelling of 690459802233921 in words is "six hundred ninety trillion, four hundred fifty-nine billion, eight hundred two million, two hundred thirty-three thousand, nine hundred twenty-one".