11645890945 has 16 divisors (see below), whose sum is σ = 15296802192. Its totient is φ = 8459055360.

The previous prime is 11645890877. The next prime is 11645890967. The reversal of 11645890945 is 54909854611.

It can be written as a sum of positive squares in 8 ways, for example, as 1389872961 + 10256017984 = 37281^2 + 101272^2 .

It is not a de Polignac number, because 11645890945 - 2¹¹ = 11645888897 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11645890892 and 11645890901.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1464622 + ... + 1472551.

It is an arithmetic number, because the mean of its divisors is an integer number (956050137).

Almost surely, 2^11645890945 is an apocalyptic number.

It is an amenable number.

11645890945 is a deficient number, since it is larger than the sum of its proper divisors (3650911247).

11645890945 is a wasteful number, since it uses less digits than its factorization.

11645890945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2937252.

The product of its (nonzero) digits is 1555200, while the sum is 52.

The spelling of 11645890945 in words is "eleven billion, six hundred forty-five million, eight hundred ninety thousand, nine hundred forty-five".