11643061654 has 64 divisors (see below), whose sum is σ = 21209997312. Its totient is φ = 4687372800.

The previous prime is 11643061637. The next prime is 11643061669. The reversal of 11643061654 is 45616034611.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13215294 + ... + 13216174.

It is an arithmetic number, because the mean of its divisors is an integer number (331406208).

Almost surely, 2^11643061654 is an apocalyptic number.

11643061654 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

11643061654 is a deficient number, since it is larger than the sum of its proper divisors (9566935658).

11643061654 is a wasteful number, since it uses less digits than its factorization.

11643061654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1781.

The product of its (nonzero) digits is 51840, while the sum is 37.

It can be divided in two parts, 116430 and 61654, that added together give a square (178084 = 422²).

The spelling of 11643061654 in words is "eleven billion, six hundred forty-three million, sixty-one thousand, six hundred fifty-four".