11857897736 has 8 divisors (see below), whose sum is σ = 22233558270. Its totient is φ = 5928948864.

The previous prime is 11857897729. The next prime is 11857897747. The reversal of 11857897736 is 63779875811.

It can be written as a sum of positive squares in only one way, i.e., 11558400100 + 299497636 = 107510^2 + 17306^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 741118601 + ... + 741118616.

Almost surely, 2^11857897736 is an apocalyptic number.

It is an amenable number.

11857897736 is a deficient number, since it is larger than the sum of its proper divisors (10375660534).

11857897736 is a wasteful number, since it uses less digits than its factorization.

11857897736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1482237223 (or 1482237219 counting only the distinct ones).

The product of its digits is 17781120, while the sum is 62.

The spelling of 11857897736 in words is "eleven billion, eight hundred fifty-seven million, eight hundred ninety-seven thousand, seven hundred thirty-six".