261251062026 has 16 divisors (see below), whose sum is σ = 522518845728. Its totient is φ = 87080900400.

The previous prime is 261251061943. The next prime is 261251062049. The reversal of 261251062026 is 620260152162.

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, 488860 + ... + 872631.

It is an arithmetic number, because the mean of its divisors is an integer number (32657427858).

Almost surely, 2^261251062026 is an apocalyptic number.

261251062026 is an abundant number, since it is smaller than the sum of its proper divisors (261267783702).

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

261251062026 is a wasteful number, since it uses less digits than its factorization.

261251062026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1393477.

The product of its (nonzero) digits is 17280, while the sum is 33.

The spelling of 261251062026 in words is "two hundred sixty-one billion, two hundred fifty-one million, sixty-two thousand, twenty-six".