999738845611 has 16 divisors (see below), whose sum is σ = 1147047257088. Its totient is φ = 862940613600.

The previous prime is 999738845587. The next prime is 999738845617. The reversal of 999738845611 is 116548837999.

It is a cyclic number.

It is not a de Polignac number, because 999738845611 - 2³⁹ = 449983031723 is a prime.

It is a super-2 number, since 2×999738845611² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (999738845617) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27640281 + ... + 27676426.

It is an arithmetic number, because the mean of its divisors is an integer number (71690453568).

Almost surely, 2^999738845611 is an apocalyptic number.

999738845611 is a deficient number, since it is larger than the sum of its proper divisors (147308411477).

999738845611 is a wasteful number, since it uses less digits than its factorization.

999738845611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55316802.

The product of its digits is 117573120, while the sum is 70.

The spelling of 999738845611 in words is "nine hundred ninety-nine billion, seven hundred thirty-eight million, eight hundred forty-five thousand, six hundred eleven".