3912825779640 has 128 divisors (see below), whose sum is σ = 13463486668800. Its totient is φ = 1009761482880.

The previous prime is 3912825779591. The next prime is 3912825779677. The reversal of 3912825779640 is 469775282193.

3912825779640 is a `hidden beast` number, since 3 + 9 + 12 + 8 + 2 + 577 + 9 + 6 + 40 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 58401792 + ... + 58468751.

It is an arithmetic number, because the mean of its divisors is an integer number (105183489600).

It is a 1-persistent number, because it is pandigital, but 2⋅3912825779640 = 7825651559280 is not.

Almost surely, 2^{3912825779640} is an apocalyptic number.

3912825779640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3912825779640 is an abundant number, since it is smaller than the sum of its proper divisors (9550660889160).

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

3912825779640 is a wasteful number, since it uses less digits than its factorization.

3912825779640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116870594 (or 116870584 counting only the distinct ones).

The product of its (nonzero) digits is 45722880, while the sum is 63.

The spelling of 3912825779640 in words is "three trillion, nine hundred twelve billion, eight hundred twenty-five million, seven hundred seventy-nine thousand, six hundred forty".