16945623937 has 4 divisors (see below), whose sum is σ = 18486135216. Its totient is φ = 15405112660.

The previous prime is 16945623913. The next prime is 16945623943. The reversal of 16945623937 is 73932654961.

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 16945623937 - 2³¹ = 14798140289 is a prime.

It is a super-2 number, since 2×16945623937² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16945623337) 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, 770255623 + ... + 770255644.

It is an arithmetic number, because the mean of its divisors is an integer number (4621533804).

Almost surely, 2^16945623937 is an apocalyptic number.

It is an amenable number.

16945623937 is a deficient number, since it is larger than the sum of its proper divisors (1540511279).

16945623937 is a wasteful number, since it uses less digits than its factorization.

16945623937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1540511278.

The product of its digits is 7348320, while the sum is 55.

The spelling of 16945623937 in words is "sixteen billion, nine hundred forty-five million, six hundred twenty-three thousand, nine hundred thirty-seven".