11644437698 has 16 divisors (see below), whose sum is σ = 18431828640. Its totient is φ = 5502024000.

The previous prime is 11644437667. The next prime is 11644437703. The reversal of 11644437698 is 89673444611.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 366848 + ... + 397323.

It is an arithmetic number, because the mean of its divisors is an integer number (1151989290).

Almost surely, 2^11644437698 is an apocalyptic number.

11644437698 is a deficient number, since it is larger than the sum of its proper divisors (6787390942).

11644437698 is a wasteful number, since it uses less digits than its factorization.

11644437698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 764593.

The product of its digits is 3483648, while the sum is 53.

The spelling of 11644437698 in words is "eleven billion, six hundred forty-four million, four hundred thirty-seven thousand, six hundred ninety-eight".