1138661591264 has 12 divisors (see below), whose sum is σ = 2241740007864. Its totient is φ = 569330795616.

The previous prime is 1138661591239. The next prime is 1138661591267. The reversal of 1138661591264 is 4621951668311.

It is a super-2 number, since 2×1138661591264² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138661591267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17791587332 + ... + 17791587395.

It is an arithmetic number, because the mean of its divisors is an integer number (186811667322).

Almost surely, 2^{1138661591264} is an apocalyptic number.

It is an amenable number.

1138661591264 is a deficient number, since it is larger than the sum of its proper divisors (1103078416600).

1138661591264 is an equidigital number, since it uses as much as digits as its factorization.

1138661591264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35583174737 (or 35583174729 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 53.

The spelling of 1138661591264 in words is "one trillion, one hundred thirty-eight billion, six hundred sixty-one million, five hundred ninety-one thousand, two hundred sixty-four".