7979057281 has 32 divisors (see below), whose sum is σ = 8899632000. Its totient is φ = 7108197888.

The previous prime is 7979057263. The next prime is 7979057291. The reversal of 7979057281 is 1827509797.

It is not a de Polignac number, because 7979057281 - 2⁵ = 7979057249 is a prime.

It is a super-2 number, since 2×7979057281² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7979057291) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12218751 + ... + 12219403.

It is an arithmetic number, because the mean of its divisors is an integer number (278113500).

Almost surely, 2^7979057281 is an apocalyptic number.

It is an amenable number.

7979057281 is a deficient number, since it is larger than the sum of its proper divisors (920574719).

7979057281 is a wasteful number, since it uses less digits than its factorization.

7979057281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 993.

The product of its (nonzero) digits is 2222640, while the sum is 55.

The square root of 7979057281 is about 89325.5690214174. The cubic root of 7979057281 is about 1998.2532482900.

The spelling of 7979057281 in words is "seven billion, nine hundred seventy-nine million, fifty-seven thousand, two hundred eighty-one".