251361412026 has 32 divisors (see below), whose sum is σ = 518969991168. Its totient is φ = 81079591920.

The previous prime is 251361411947. The next prime is 251361412031. The reversal of 251361412026 is 620214163152.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4646731 + ... + 4700513.

It is an arithmetic number, because the mean of its divisors is an integer number (16217812224).

Almost surely, 2^251361412026 is an apocalyptic number.

251361412026 is an abundant number, since it is smaller than the sum of its proper divisors (267608579142).

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

251361412026 is a wasteful number, since it uses less digits than its factorization.

251361412026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78946.

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

Adding to 251361412026 its reverse (620214163152), we get a palindrome (871575575178).

The spelling of 251361412026 in words is "two hundred fifty-one billion, three hundred sixty-one million, four hundred twelve thousand, twenty-six".