16503623445 has 16 divisors (see below), whose sum is σ = 26639479872. Its totient is φ = 8724038400.

The previous prime is 16503623431. The next prime is 16503623453. The reversal of 16503623445 is 54432630561.

It is not a de Polignac number, because 16503623445 - 2²³ = 16495234837 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4866631 + ... + 4870020.

It is an arithmetic number, because the mean of its divisors is an integer number (1664967492).

Almost surely, 2^16503623445 is an apocalyptic number.

16503623445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16503623445 is a deficient number, since it is larger than the sum of its proper divisors (10135856427).

16503623445 is a wasteful number, since it uses less digits than its factorization.

16503623445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9736772.

The product of its (nonzero) digits is 259200, while the sum is 39.

The spelling of 16503623445 in words is "sixteen billion, five hundred three million, six hundred twenty-three thousand, four hundred forty-five".