11654139478 has 16 divisors (see below), whose sum is σ = 18480262320. Its totient is φ = 5496685056.

The previous prime is 11654139463. The next prime is 11654139493. The reversal of 11654139478 is 87493145611.

It is an interprime number because it is at equal distance from previous prime (11654139463) and next prime (11654139493).

It is a super-2 number, since 2×11654139478² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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, 649275 + ... + 666982.

It is an arithmetic number, because the mean of its divisors is an integer number (1155016395).

Almost surely, 2^11654139478 is an apocalyptic number.

11654139478 is a deficient number, since it is larger than the sum of its proper divisors (6826122842).

11654139478 is a wasteful number, since it uses less digits than its factorization.

11654139478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1316511.

The product of its digits is 725760, while the sum is 49.

The spelling of 11654139478 in words is "eleven billion, six hundred fifty-four million, one hundred thirty-nine thousand, four hundred seventy-eight".