11585403387 has 12 divisors (see below), whose sum is σ = 17615233480. Its totient is φ = 7317096768.

The previous prime is 11585403383. The next prime is 11585403409. The reversal of 11585403387 is 78330458511.

It is a happy number.

It is not a de Polignac number, because 11585403387 - 2² = 11585403383 is a prime.

It is a super-2 number, since 2×11585403387² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11585403383) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33875278 + ... + 33875619.

Almost surely, 2^11585403387 is an apocalyptic number.

11585403387 is a deficient number, since it is larger than the sum of its proper divisors (6029830093).

11585403387 is a wasteful number, since it uses less digits than its factorization.

11585403387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67750922 (or 67750919 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 45.

The spelling of 11585403387 in words is "eleven billion, five hundred eighty-five million, four hundred three thousand, three hundred eighty-seven".