261340214564 has 72 divisors (see below), whose sum is σ = 541560823104. Its totient is φ = 109614859200.

The previous prime is 261340214543. The next prime is 261340214567. The reversal of 261340214564 is 465412043162.

261340214564 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (261340214567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24577529 + ... + 24588159.

Almost surely, 2^261340214564 is an apocalyptic number.

It is an amenable number.

261340214564 is an abundant number, since it is smaller than the sum of its proper divisors (280220608540).

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

261340214564 is a wasteful number, since it uses less digits than its factorization.

261340214564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14577 (or 14564 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 38.

The spelling of 261340214564 in words is "two hundred sixty-one billion, three hundred forty million, two hundred fourteen thousand, five hundred sixty-four".