11651440023 has 12 divisors (see below), whose sum is σ = 17147403000. Its totient is φ = 7621067376.

The previous prime is 11651439979. The next prime is 11651440033. The reversal of 11651440023 is 32004415611.

It is a happy number.

11651440023 is a `hidden beast` number, since 1 + 1 + 651 + 4 + 4 + 0 + 0 + 2 + 3 = 666.

It is not a de Polignac number, because 11651440023 - 2¹⁷ = 11651308951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11651440033) 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, 12212773 + ... + 12213726.

It is an arithmetic number, because the mean of its divisors is an integer number (1428950250).

Almost surely, 2^11651440023 is an apocalyptic number.

11651440023 is a deficient number, since it is larger than the sum of its proper divisors (5495962977).

11651440023 is a wasteful number, since it uses less digits than its factorization.

11651440023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24426558 (or 24426555 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

Adding to 11651440023 its reverse (32004415611), we get a palindrome (43655855634).

The spelling of 11651440023 in words is "eleven billion, six hundred fifty-one million, four hundred forty thousand, twenty-three".