11859645604 has 27 divisors (see below), whose sum is σ = 22053925537. Its totient is φ = 5579267264.

The previous prime is 11859645599. The next prime is 11859645607. The reversal of 11859645604 is 40654695811.

It is a happy number.

The square root of 11859645604 is 108902.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 9233288100 + 2626357504 = 96090^2 + 51248^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11859645607) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3701067 + ... + 3704269.

Almost surely, 2^11859645604 is an apocalyptic number.

11859645604 is the 108902-nd square number.

It is an amenable number.

11859645604 is a deficient number, since it is larger than the sum of its proper divisors (10194279933).

11859645604 is an frugal number, since it uses more digits than its factorization.

11859645604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6444 (or 3222 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 49.

Multiplying 11859645604 by its sum of digits (49), we get a square (581122634596 = 762314²).

The spelling of 11859645604 in words is "eleven billion, eight hundred fifty-nine million, six hundred forty-five thousand, six hundred four".