261647525726254 has 16 divisors (see below), whose sum is σ = 395769695233536. Its totient is φ = 129725377740000.

The previous prime is 261647525726219. The next prime is 261647525726263. The reversal of 261647525726254 is 452627525746162.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 270455697 + ... + 271421404.

It is an arithmetic number, because the mean of its divisors is an integer number (24735605952096).

Almost surely, 2^{261647525726254} is an apocalyptic number.

261647525726254 is a deficient number, since it is larger than the sum of its proper divisors (134122169507282).

261647525726254 is a wasteful number, since it uses less digits than its factorization.

261647525726254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541879131.

The product of its digits is 338688000, while the sum is 64.

The spelling of 261647525726254 in words is "two hundred sixty-one trillion, six hundred forty-seven billion, five hundred twenty-five million, seven hundred twenty-six thousand, two hundred fifty-four".