2017902639842 has 16 divisors (see below), whose sum is σ = 3091732648632. Its totient is φ = 987420994560.

The previous prime is 2017902639829. The next prime is 2017902639859. The reversal of 2017902639842 is 2489362097102.

It is a Cunningham number, because it is equal to 1420529²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 2017902639841 + 1 = 1420529^2 + 1^2 .

It is a Harshad number since it is a multiple of its sum of digits (53).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23933759 + ... + 24017922.

Almost surely, 2^{2017902639842} is an apocalyptic number.

2017902639842 is a deficient number, since it is larger than the sum of its proper divisors (1073830008790).

2017902639842 is a wasteful number, since it uses less digits than its factorization.

2017902639842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47952133.

The product of its (nonzero) digits is 2612736, while the sum is 53.

The spelling of 2017902639842 in words is "two trillion, seventeen billion, nine hundred two million, six hundred thirty-nine thousand, eight hundred forty-two".