261252166488036 has 48 divisors (see below), whose sum is σ = 622642120176384. Its totient is φ = 85219735288576.

The previous prime is 261252166488011. The next prime is 261252166488101. The reversal of 261252166488036 is 630884661252162.

It is a super-2 number, since 2×261252166488036² (a number of 30 digits) contains 22 as substring.

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, 26967015 + ... + 35351438.

It is an arithmetic number, because the mean of its divisors is an integer number (12971710837008).

Almost surely, 2^{261252166488036} is an apocalyptic number.

It is an amenable number.

261252166488036 is an abundant number, since it is smaller than the sum of its proper divisors (361389953688348).

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

261252166488036 is a wasteful number, since it uses less digits than its factorization.

261252166488036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62325940 (or 62325938 counting only the distinct ones).

The product of its (nonzero) digits is 39813120, while the sum is 60.

The spelling of 261252166488036 in words is "two hundred sixty-one trillion, two hundred fifty-two billion, one hundred sixty-six million, four hundred eighty-eight thousand, thirty-six".