261226142312598 has 64 divisors (see below), whose sum is σ = 611058606048000. Its totient is φ = 82492020171072.

The previous prime is 261226142312563. The next prime is 261226142312647. The reversal of 261226142312598 is 895213241622162.

261226142312598 is a `hidden beast` number, since 2 + 6 + 1 + 2 + 2 + 6 + 1 + 42 + 3 + 1 + 2 + 598 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

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, 225457138 + ... + 226612826.

It is an arithmetic number, because the mean of its divisors is an integer number (9547790719500).

Almost surely, 2^{261226142312598} is an apocalyptic number.

261226142312598 is an abundant number, since it is smaller than the sum of its proper divisors (349832463735402).

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

261226142312598 is a wasteful number, since it uses less digits than its factorization.

261226142312598 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1376026 (or 1376020 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 54.

The spelling of 261226142312598 in words is "two hundred sixty-one trillion, two hundred twenty-six billion, one hundred forty-two million, three hundred twelve thousand, five hundred ninety-eight".