261590296852644 has 96 divisors (see below), whose sum is σ = 612010164648960. Its totient is φ = 86963898333312.

The previous prime is 261590296852601. The next prime is 261590296852667. The reversal of 261590296852644 is 446258692095162.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33723123214 + ... + 33723130970.

It is an arithmetic number, because the mean of its divisors is an integer number (6375105881760).

Almost surely, 2^{261590296852644} is an apocalyptic number.

It is an amenable number.

261590296852644 is an abundant number, since it is smaller than the sum of its proper divisors (350419867796316).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261590296852644 is a wasteful number, since it uses less digits than its factorization.

261590296852644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13137 (or 13135 counting only the distinct ones).

The product of its (nonzero) digits is 447897600, while the sum is 69.

The spelling of 261590296852644 in words is "two hundred sixty-one trillion, five hundred ninety billion, two hundred ninety-six million, eight hundred fifty-two thousand, six hundred forty-four".