261515264127432 has 32 divisors (see below), whose sum is σ = 747186468936000. Its totient is φ = 74718646893504.

The previous prime is 261515264127427. The next prime is 261515264127433. The reversal of 261515264127432 is 234721462515162.

It is not an unprimeable number, because it can be changed into a prime (261515264127433) 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, 778319238307 + ... + 778319238642.

It is an arithmetic number, because the mean of its divisors is an integer number (23349577154250).

Almost surely, 2^{261515264127432} is an apocalyptic number.

It is an amenable number.

261515264127432 is an abundant number, since it is smaller than the sum of its proper divisors (485671204808568).

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

261515264127432 is a wasteful number, since it uses less digits than its factorization.

261515264127432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1556638476965 (or 1556638476961 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 51.

The spelling of 261515264127432 in words is "two hundred sixty-one trillion, five hundred fifteen billion, two hundred sixty-four million, one hundred twenty-seven thousand, four hundred thirty-two".