260426991979 has 48 divisors (see below), whose sum is σ = 341321472000. Its totient is φ = 196283606400.

The previous prime is 260426991977. The next prime is 260426992009. The reversal of 260426991979 is 979199624062.

It is not a de Polignac number, because 260426991979 - 2¹ = 260426991977 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 260426991979.

It is not an unprimeable number, because it can be changed into a prime (260426991971) 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, 57627082 + ... + 57631600.

It is an arithmetic number, because the mean of its divisors is an integer number (7110864000).

Almost surely, 2^260426991979 is an apocalyptic number.

260426991979 is a deficient number, since it is larger than the sum of its proper divisors (80894480021).

260426991979 is a wasteful number, since it uses less digits than its factorization.

260426991979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8024 (or 8017 counting only the distinct ones).

The product of its (nonzero) digits is 26453952, while the sum is 64.

The spelling of 260426991979 in words is "two hundred sixty billion, four hundred twenty-six million, nine hundred ninety-one thousand, nine hundred seventy-nine".