17620590661 has 16 divisors (see below), whose sum is σ = 19003610880. Its totient is φ = 16276971520.

The previous prime is 17620590653. The next prime is 17620590667. The reversal of 17620590661 is 16609502671.

It is a cyclic number.

It is not a de Polignac number, because 17620590661 - 2³ = 17620590653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17620590667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 629220 + ... + 656626.

It is an arithmetic number, because the mean of its divisors is an integer number (1187725680).

Almost surely, 2^17620590661 is an apocalyptic number.

It is an amenable number.

17620590661 is a deficient number, since it is larger than the sum of its proper divisors (1383020219).

17620590661 is a wasteful number, since it uses less digits than its factorization.

17620590661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28124.

The product of its (nonzero) digits is 136080, while the sum is 43.

The spelling of 17620590661 in words is "seventeen billion, six hundred twenty million, five hundred ninety thousand, six hundred sixty-one".