261510664096 has 48 divisors (see below), whose sum is σ = 567214589088. Its totient is φ = 117691552000.

The previous prime is 261510664091. The next prime is 261510664127. The reversal of 261510664096 is 690466015162.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (261510664091) 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, 3642310 + ... + 3713413.

It is an arithmetic number, because the mean of its divisors is an integer number (11816970606).

Almost surely, 2^261510664096 is an apocalyptic number.

It is an amenable number.

261510664096 is an abundant number, since it is smaller than the sum of its proper divisors (305703924992).

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

261510664096 is a wasteful number, since it uses less digits than its factorization.

261510664096 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7355845 (or 7355837 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 46.

It can be divided in two parts, 26151066 and 4096, that added together give a palindrome (26155162).

The spelling of 261510664096 in words is "two hundred sixty-one billion, five hundred ten million, six hundred sixty-four thousand, ninety-six".