7978093641 has 24 divisors (see below), whose sum is σ = 13204975680. Its totient is φ = 4546868256.

The previous prime is 7978093639. The next prime is 7978093667. The reversal of 7978093641 is 1463908797.

It is a happy number.

It is not a de Polignac number, because 7978093641 - 2¹ = 7978093639 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7978093601) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 143190 + ... + 190943.

It is an arithmetic number, because the mean of its divisors is an integer number (550207320).

Almost surely, 2^7978093641 is an apocalyptic number.

It is an amenable number.

7978093641 is a deficient number, since it is larger than the sum of its proper divisors (5226882039).

7978093641 is a wasteful number, since it uses less digits than its factorization.

7978093641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334525 (or 334522 counting only the distinct ones).

The product of its (nonzero) digits is 2286144, while the sum is 54.

The square root of 7978093641 is about 89320.1748822739. The cubic root of 7978093641 is about 1998.1728012641.

The spelling of 7978093641 in words is "seven billion, nine hundred seventy-eight million, ninety-three thousand, six hundred forty-one".