261431333417136 has 40 divisors (see below), whose sum is σ = 676466014249840. Its totient is φ = 87001618288896.

The previous prime is 261431333417099. The next prime is 261431333417141. The reversal of 261431333417136 is 631714333134162.

261431333417136 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 4442455171 + ... + 4442514018.

It is an arithmetic number, because the mean of its divisors is an integer number (16911650356246).

Almost surely, 2^{261431333417136} is an apocalyptic number.

It is an amenable number.

261431333417136 is an abundant number, since it is smaller than the sum of its proper divisors (415034680832704).

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

261431333417136 is a wasteful number, since it uses less digits than its factorization.

261431333417136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8884969813 (or 8884969807 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 48.

The spelling of 261431333417136 in words is "two hundred sixty-one trillion, four hundred thirty-one billion, three hundred thirty-three million, four hundred seventeen thousand, one hundred thirty-six".