1639883245 has 48 divisors (see below), whose sum is σ = 2689400448. Its totient is φ = 943608960.

The previous prime is 1639883227. The next prime is 1639883263. The reversal of 1639883245 is 5423889361.

It is an interprime number because it is at equal distance from previous prime (1639883227) and next prime (1639883263).

It is not a de Polignac number, because 1639883245 - 2²³ = 1631494637 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11632 + ... + 58438.

It is an arithmetic number, because the mean of its divisors is an integer number (56029176).

Almost surely, 2^1639883245 is an apocalyptic number.

It is an amenable number.

1639883245 is a deficient number, since it is larger than the sum of its proper divisors (1049517203).

1639883245 is a wasteful number, since it uses less digits than its factorization.

1639883245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46850 (or 46843 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 49.

The square root of 1639883245 is about 40495.4719073627. The cubic root of 1639883245 is about 1179.2457223499.

The spelling of 1639883245 in words is "one billion, six hundred thirty-nine million, eight hundred eighty-three thousand, two hundred forty-five".