1639059057 has 24 divisors (see below), whose sum is σ = 2486323840. Its totient is φ = 1078861680.

The previous prime is 1639059047. The next prime is 1639059061. The reversal of 1639059057 is 7509509361.

1639059057 is a `hidden beast` number, since 1 + 6 + 3 + 9 + 0 + 590 + 57 = 666.

It is not a de Polignac number, because 1639059057 - 2¹² = 1639054961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1639059047) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23494 + ... + 61887.

Almost surely, 2^1639059057 is an apocalyptic number.

It is an amenable number.

1639059057 is a deficient number, since it is larger than the sum of its proper divisors (847264783).

1639059057 is an frugal number, since it uses more digits than its factorization.

1639059057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85475 (or 85463 counting only the distinct ones).

The product of its (nonzero) digits is 255150, while the sum is 45.

The square root of 1639059057 is about 40485.2943301639. The cubic root of 1639059057 is about 1179.0481304284.

The spelling of 1639059057 in words is "one billion, six hundred thirty-nine million, fifty-nine thousand, fifty-seven".