7859772078381 has 48 divisors (see below), whose sum is σ = 11420210081280. Its totient is φ = 5208926330880.

The previous prime is 7859772078341. The next prime is 7859772078383. The reversal of 7859772078381 is 1838702779587.

7859772078381 is a `hidden beast` number, since 7 + 8 + 597 + 7 + 20 + 7 + 8 + 3 + 8 + 1 = 666.

It is not a de Polignac number, because 7859772078381 - 2¹⁴ = 7859772061997 is a prime.

It is a super-2 number, since 2×7859772078381² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7859772078383) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4393387635 + ... + 4393389423.

It is an arithmetic number, because the mean of its divisors is an integer number (237921043360).

Almost surely, 2^{7859772078381} is an apocalyptic number.

It is an amenable number.

7859772078381 is a deficient number, since it is larger than the sum of its proper divisors (3560438002899).

7859772078381 is a wasteful number, since it uses less digits than its factorization.

7859772078381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4826 (or 4823 counting only the distinct ones).

The product of its (nonzero) digits is 331914240, while the sum is 72.

The spelling of 7859772078381 in words is "seven trillion, eight hundred fifty-nine billion, seven hundred seventy-two million, seventy-eight thousand, three hundred eighty-one".