7865212052478 has 32 divisors (see below), whose sum is σ = 17269764992640. Its totient is φ = 2368216712160.

The previous prime is 7865212052461. The next prime is 7865212052507. The reversal of 7865212052478 is 8742502125687.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 379511548 + ... + 379532271.

It is an arithmetic number, because the mean of its divisors is an integer number (539680156020).

Almost surely, 2^{7865212052478} is an apocalyptic number.

7865212052478 is an abundant number, since it is smaller than the sum of its proper divisors (9404552940162).

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

7865212052478 is a wasteful number, since it uses less digits than its factorization.

7865212052478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 759043992.

The product of its (nonzero) digits is 15052800, while the sum is 57.

The spelling of 7865212052478 in words is "seven trillion, eight hundred sixty-five billion, two hundred twelve million, fifty-two thousand, four hundred seventy-eight".