11512257761 has 8 divisors (see below), whose sum is σ = 12196168704. Its totient is φ = 10829093440.

The previous prime is 11512257751. The next prime is 11512257763. The reversal of 11512257761 is 16775221511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11512257761 - 2⁶ = 11512257697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11512257763) 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, 154745 + ... + 216726.

It is an arithmetic number, because the mean of its divisors is an integer number (1524521088).

Almost surely, 2^11512257761 is an apocalyptic number.

It is an amenable number.

11512257761 is a deficient number, since it is larger than the sum of its proper divisors (683910943).

11512257761 is a wasteful number, since it uses less digits than its factorization.

11512257761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373311.

The product of its digits is 29400, while the sum is 38.

The spelling of 11512257761 in words is "eleven billion, five hundred twelve million, two hundred fifty-seven thousand, seven hundred sixty-one".