2691857885138 has 8 divisors (see below), whose sum is σ = 4131688847088. Its totient is φ = 1314628269444.

The previous prime is 2691857885117. The next prime is 2691857885141. The reversal of 2691857885138 is 8315887581962.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15650336456 + ... + 15650336627.

It is an arithmetic number, because the mean of its divisors is an integer number (516461105886).

Almost surely, 2^{2691857885138} is an apocalyptic number.

2691857885138 is a deficient number, since it is larger than the sum of its proper divisors (1439830961950).

2691857885138 is a wasteful number, since it uses less digits than its factorization.

2691857885138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31300673128.

The product of its digits is 232243200, while the sum is 71.

The spelling of 2691857885138 in words is "two trillion, six hundred ninety-one billion, eight hundred fifty-seven million, eight hundred eighty-five thousand, one hundred thirty-eight".