260209572779521 has 16 divisors (see below), whose sum is σ = 269375596358400. Its totient is φ = 251056453278400.

The previous prime is 260209572779501. The next prime is 260209572779539. The reversal of 260209572779521 is 125977275902062.

It is a cyclic number.

It is not a de Polignac number, because 260209572779521 - 2²⁵ = 260209539225089 is a prime.

It is a super-2 number, since 2×260209572779521² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (260209572779501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 826663356 + ... + 826978066.

It is an arithmetic number, because the mean of its divisors is an integer number (16835974772400).

Almost surely, 2^{260209572779521} is an apocalyptic number.

It is an amenable number.

260209572779521 is a deficient number, since it is larger than the sum of its proper divisors (9166023578879).

260209572779521 is a wasteful number, since it uses less digits than its factorization.

260209572779521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335120.

The product of its (nonzero) digits is 66679200, while the sum is 64.

The spelling of 260209572779521 in words is "two hundred sixty trillion, two hundred nine billion, five hundred seventy-two million, seven hundred seventy-nine thousand, five hundred twenty-one".