261451114446536 has 64 divisors (see below), whose sum is σ = 563615259540480. Its totient is φ = 111377922546240.

The previous prime is 261451114446527. The next prime is 261451114446551. The reversal of 261451114446536 is 635644411154162.

It is a happy number.

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, 843423491 + ... + 843733421.

It is an arithmetic number, because the mean of its divisors is an integer number (8806488430320).

Almost surely, 2^{261451114446536} is an apocalyptic number.

It is an amenable number.

261451114446536 is an abundant number, since it is smaller than the sum of its proper divisors (302164145093944).

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

261451114446536 is a wasteful number, since it uses less digits than its factorization.

261451114446536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400314 (or 400310 counting only the distinct ones).

The product of its digits is 8294400, while the sum is 53.

The spelling of 261451114446536 in words is "two hundred sixty-one trillion, four hundred fifty-one billion, one hundred fourteen million, four hundred forty-six thousand, five hundred thirty-six".