260990518509 has 48 divisors (see below), whose sum is σ = 433927323648. Its totient is φ = 148072889376.

The previous prime is 260990518493. The next prime is 260990518511. The reversal of 260990518509 is 905815099062.

It is not a de Polignac number, because 260990518509 - 2⁴ = 260990518493 is a prime.

It is a super-3 number, since 3×260990518509³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (260990518309) 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, 5223604 + ... + 5273330.

It is an arithmetic number, because the mean of its divisors is an integer number (9040152576).

Almost surely, 2^260990518509 is an apocalyptic number.

It is an amenable number.

260990518509 is a deficient number, since it is larger than the sum of its proper divisors (172936805139).

260990518509 is a wasteful number, since it uses less digits than its factorization.

260990518509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50334 (or 50331 counting only the distinct ones).

The product of its (nonzero) digits is 1749600, while the sum is 54.

The spelling of 260990518509 in words is "two hundred sixty billion, nine hundred ninety million, five hundred eighteen thousand, five hundred nine".