7978149357 has 8 divisors (see below), whose sum is σ = 11100033984. Its totient is φ = 5087515488.

The previous prime is 7978149353. The next prime is 7978149359. The reversal of 7978149357 is 7539418797.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7978149357 - 2² = 7978149353 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7978149357.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7978149353) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57812608 + ... + 57812745.

It is an arithmetic number, because the mean of its divisors is an integer number (1387504248).

Almost surely, 2^7978149357 is an apocalyptic number.

It is an amenable number.

7978149357 is a deficient number, since it is larger than the sum of its proper divisors (3121884627).

7978149357 is a wasteful number, since it uses less digits than its factorization.

7978149357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115625379.

The product of its digits is 13335840, while the sum is 60.

The square root of 7978149357 is about 89320.4867709531. The cubic root of 7978149357 is about 1998.1774527486.

The spelling of 7978149357 in words is "seven billion, nine hundred seventy-eight million, one hundred forty-nine thousand, three hundred fifty-seven".