12640292650278 has 48 divisors (see below), whose sum is σ = 27461310529536. Its totient is φ = 4202046772080.

The previous prime is 12640292650259. The next prime is 12640292650319. The reversal of 12640292650278 is 87205629204621.

12640292650278 is a `hidden beast` number, since 1 + 2 + 6 + 40 + 2 + 9 + 26 + 502 + 78 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 81319813 + ... + 81475103.

It is an arithmetic number, because the mean of its divisors is an integer number (572110636032).

Almost surely, 2^{12640292650278} is an apocalyptic number.

12640292650278 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12640292650278 is an abundant number, since it is smaller than the sum of its proper divisors (14821017879258).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12640292650278 is a wasteful number, since it uses less digits than its factorization.

12640292650278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167489 (or 167486 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 54.

The spelling of 12640292650278 in words is "twelve trillion, six hundred forty billion, two hundred ninety-two million, six hundred fifty thousand, two hundred seventy-eight".