16690863401 has 4 divisors (see below), whose sum is σ = 16818274704. Its totient is φ = 16563452100.

The previous prime is 16690863361. The next prime is 16690863407. The reversal of 16690863401 is 10436809661.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16690863401 - 2³⁰ = 15617121577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16690863407) 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 3 ways as a sum of consecutive naturals, for example, 63705455 + ... + 63705716.

It is an arithmetic number, because the mean of its divisors is an integer number (4204568676).

Almost surely, 2^16690863401 is an apocalyptic number.

It is an amenable number.

16690863401 is a deficient number, since it is larger than the sum of its proper divisors (127411303).

16690863401 is a wasteful number, since it uses less digits than its factorization.

16690863401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127411302.

The product of its (nonzero) digits is 186624, while the sum is 44.

The spelling of 16690863401 in words is "sixteen billion, six hundred ninety million, eight hundred sixty-three thousand, four hundred one".