979281448681 has 4 divisors (see below), whose sum is σ = 1010871172864. Its totient is φ = 947691724500.

The previous prime is 979281448679. The next prime is 979281448709. The reversal of 979281448681 is 186844182979.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 979281448681 - 2¹ = 979281448679 is a prime.

It is a super-2 number, since 2×979281448681² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (979281448631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15794862045 + ... + 15794862106.

It is an arithmetic number, because the mean of its divisors is an integer number (252717793216).

Almost surely, 2^979281448681 is an apocalyptic number.

It is an amenable number.

979281448681 is a deficient number, since it is larger than the sum of its proper divisors (31589724183).

979281448681 is a wasteful number, since it uses less digits than its factorization.

979281448681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31589724182.

The product of its digits is 55738368, while the sum is 67.

The spelling of 979281448681 in words is "nine hundred seventy-nine billion, two hundred eighty-one million, four hundred forty-eight thousand, six hundred eighty-one".