261732645357144 has 32 divisors (see below), whose sum is σ = 704664814423920. Its totient is φ = 80533121648256.

The previous prime is 261732645357107. The next prime is 261732645357173. The reversal of 261732645357144 is 441753546237162.

It is a congruent number.

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, 419443341607 + ... + 419443342230.

Almost surely, 2^{261732645357144} is an apocalyptic number.

261732645357144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

261732645357144 is an abundant number, since it is smaller than the sum of its proper divisors (442932169066776).

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

261732645357144 is a wasteful number, since it uses less digits than its factorization.

261732645357144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 838886683859 (or 838886683855 counting only the distinct ones).

The product of its digits is 101606400, while the sum is 60.

The spelling of 261732645357144 in words is "two hundred sixty-one trillion, seven hundred thirty-two billion, six hundred forty-five million, three hundred fifty-seven thousand, one hundred forty-four".