16901990761 has 4 divisors (see below), whose sum is σ = 16934432724. Its totient is φ = 16869548800.

The previous prime is 16901990747. The next prime is 16901990771. The reversal of 16901990761 is 16709910961.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9028800400 + 7873190361 = 95020^2 + 88731^2 .

It is a cyclic number.

It is not a de Polignac number, because 16901990761 - 2²⁵ = 16868436329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16901990701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16220200 + ... + 16221241.

It is an arithmetic number, because the mean of its divisors is an integer number (4233608181).

Almost surely, 2^16901990761 is an apocalyptic number.

It is an amenable number.

16901990761 is a deficient number, since it is larger than the sum of its proper divisors (32441963).

16901990761 is an equidigital number, since it uses as much as digits as its factorization.

16901990761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32441962.

The product of its (nonzero) digits is 183708, while the sum is 49.

The spelling of 16901990761 in words is "sixteen billion, nine hundred one million, nine hundred ninety thousand, seven hundred sixty-one".