7915338915840 has 672 divisors, whose sum is σ = 29601572959296. Its totient is φ = 1949030154240.

The previous prime is 7915338915761. The next prime is 7915338915851. The reversal of 7915338915840 is 485198335197.

7915338915840 is a `hidden beast` number, since 7 + 9 + 1 + 533 + 8 + 9 + 1 + 58 + 40 = 666.

It is a super-2 number, since 2×7915338915840² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 332132725 + ... + 332156555.

Almost surely, 2^{7915338915840} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7915338915840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14800786479648).

7915338915840 is an abundant number, since it is smaller than the sum of its proper divisors (21686234043456).

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

7915338915840 is a wasteful number, since it uses less digits than its factorization.

7915338915840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23938 (or 23911 counting only the distinct ones).

The product of its (nonzero) digits is 32659200, while the sum is 63.

The spelling of 7915338915840 in words is "seven trillion, nine hundred fifteen billion, three hundred thirty-eight million, nine hundred fifteen thousand, eight hundred forty".