261326644302 has 16 divisors (see below), whose sum is σ = 530014603392. Its totient is φ = 85881995640.

The previous prime is 261326644297. The next prime is 261326644307. The reversal of 261326644302 is 203446623162.

It is an interprime number because it is at equal distance from previous prime (261326644297) and next prime (261326644307).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261326644307) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 306720988 + ... + 306721839.

It is an arithmetic number, because the mean of its divisors is an integer number (33125912712).

Almost surely, 2^261326644302 is an apocalyptic number.

261326644302 is an abundant number, since it is smaller than the sum of its proper divisors (268687959090).

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

261326644302 is a wasteful number, since it uses less digits than its factorization.

261326644302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613442903.

The product of its (nonzero) digits is 248832, while the sum is 39.

The spelling of 261326644302 in words is "two hundred sixty-one billion, three hundred twenty-six million, six hundred forty-four thousand, three hundred two".