2139085077878 has 16 divisors (see below), whose sum is σ = 3700645222560. Its totient is φ = 908340189696.

The previous prime is 2139085077859. The next prime is 2139085077901. The reversal of 2139085077878 is 8787705809312.

It is a super-3 number, since 3×2139085077878³ (a number of 38 digits) contains 333 as substring.

It is a congruent number.

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, 700878251 + ... + 700881302.

It is an arithmetic number, because the mean of its divisors is an integer number (231290326410).

Almost surely, 2^{2139085077878} is an apocalyptic number.

2139085077878 is a deficient number, since it is larger than the sum of its proper divisors (1561560144682).

2139085077878 is a wasteful number, since it uses less digits than its factorization.

2139085077878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1401759671.

The product of its (nonzero) digits is 47416320, while the sum is 65.

The spelling of 2139085077878 in words is "two trillion, one hundred thirty-nine billion, eighty-five million, seventy-seven thousand, eight hundred seventy-eight".