2139734105090 has 16 divisors (see below), whose sum is σ = 3851552066040. Its totient is φ = 855886824960.

The previous prime is 2139734105057. The next prime is 2139734105219. The reversal of 2139734105090 is 905014379312.

It is a Cunningham number, because it is equal to 1462783²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 770302873561 + 1369431231529 = 877669^2 + 1170227^2 .

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, 580916 + ... + 2148704.

Almost surely, 2^{2139734105090} is an apocalyptic number.

2139734105090 is a deficient number, since it is larger than the sum of its proper divisors (1711817960950).

2139734105090 is a wasteful number, since it uses less digits than its factorization.

2139734105090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1704277.

The product of its (nonzero) digits is 204120, while the sum is 44.

The spelling of 2139734105090 in words is "two trillion, one hundred thirty-nine billion, seven hundred thirty-four million, one hundred five thousand, ninety".