261053636432 has 10 divisors (see below), whose sum is σ = 505791420618. Its totient is φ = 130526818208.

The previous prime is 261053636381. The next prime is 261053636447. The reversal of 261053636432 is 234636350162.

It can be written as a sum of positive squares in only one way, i.e., 238608802576 + 22444833856 = 488476^2 + 149816^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 261053636432.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8157926123 + ... + 8157926154.

Almost surely, 2^261053636432 is an apocalyptic number.

It is an amenable number.

261053636432 is a deficient number, since it is larger than the sum of its proper divisors (244737784186).

261053636432 is a wasteful number, since it uses less digits than its factorization.

261053636432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16315852285 (or 16315852279 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 41.

Adding to 261053636432 its reverse (234636350162), we get a palindrome (495689986594).

The spelling of 261053636432 in words is "two hundred sixty-one billion, fifty-three million, six hundred thirty-six thousand, four hundred thirty-two".