21590617139445 has 8 divisors (see below), whose sum is σ = 34544987423136. Its totient is φ = 11514995807696.

The previous prime is 21590617139431. The next prime is 21590617139459. The reversal of 21590617139445 is 54493171609512.

It is an interprime number because it is at equal distance from previous prime (21590617139431) and next prime (21590617139459).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21590617139445 - 2⁴² = 17192570628341 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 719687237967 + ... + 719687237996.

It is an arithmetic number, because the mean of its divisors is an integer number (4318123427892).

Almost surely, 2^{21590617139445} is an apocalyptic number.

It is an amenable number.

21590617139445 is a deficient number, since it is larger than the sum of its proper divisors (12954370283691).

21590617139445 is a wasteful number, since it uses less digits than its factorization.

21590617139445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1439374475971.

The product of its (nonzero) digits is 8164800, while the sum is 57.

The spelling of 21590617139445 in words is "twenty-one trillion, five hundred ninety billion, six hundred seventeen million, one hundred thirty-nine thousand, four hundred forty-five".