261136466515436 has 24 divisors (see below), whose sum is σ = 481389187485360. Its totient is φ = 123606650894400.

The previous prime is 261136466515429. The next prime is 261136466515487. The reversal of 261136466515436 is 634515664631162.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1243923335 + ... + 1244133246.

It is an arithmetic number, because the mean of its divisors is an integer number (20057882811890).

Almost surely, 2^{261136466515436} is an apocalyptic number.

It is an amenable number.

261136466515436 is a deficient number, since it is larger than the sum of its proper divisors (220252720969924).

261136466515436 is a wasteful number, since it uses less digits than its factorization.

261136466515436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2488057985 (or 2488057983 counting only the distinct ones).

The product of its digits is 55987200, while the sum is 59.

The spelling of 261136466515436 in words is "two hundred sixty-one trillion, one hundred thirty-six billion, four hundred sixty-six million, five hundred fifteen thousand, four hundred thirty-six".