16645140374 has 4 divisors (see below), whose sum is σ = 24967710564. Its totient is φ = 8322570186.

The previous prime is 16645140349. The next prime is 16645140431. The reversal of 16645140374 is 47304154661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47304154661 = 17 ⋅2782597333.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4161285092 + ... + 4161285095.

It is an arithmetic number, because the mean of its divisors is an integer number (6241927641).

Almost surely, 2^16645140374 is an apocalyptic number.

16645140374 is a deficient number, since it is larger than the sum of its proper divisors (8322570190).

16645140374 is an equidigital number, since it uses as much as digits as its factorization.

16645140374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8322570189.

The product of its (nonzero) digits is 241920, while the sum is 41.

The spelling of 16645140374 in words is "sixteen billion, six hundred forty-five million, one hundred forty thousand, three hundred seventy-four".