11399619361 has 27 divisors (see below), whose sum is σ = 12704223987. Its totient is φ = 10224199440.

The previous prime is 11399619359. The next prime is 11399619383. The reversal of 11399619361 is 16391699311.

The square root of 11399619361 is 106769.

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., 1686334225 + 9713285136 = 41065^2 + 98556^2 .

It is not a de Polignac number, because 11399619361 - 2¹ = 11399619359 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11399619661) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 59683776 + ... + 59683966.

Almost surely, 2^11399619361 is an apocalyptic number.

11399619361 is the 106769-th square number.

11399619361 is the 53385-th centered octagonal number.

It is an amenable number.

11399619361 is a deficient number, since it is larger than the sum of its proper divisors (1304604626).

11399619361 is an frugal number, since it uses more digits than its factorization.

11399619361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494 (or 247 counting only the distinct ones).

The product of its digits is 236196, while the sum is 49.

Multiplying 11399619361 by its sum of digits (49), we get a square (558581348689 = 747383²).

The spelling of 11399619361 in words is "eleven billion, three hundred ninety-nine million, six hundred nineteen thousand, three hundred sixty-one".