11398640937 has 4 divisors (see below), whose sum is σ = 15198187920. Its totient is φ = 7599093956.

The previous prime is 11398640933. The next prime is 11398640963. The reversal of 11398640937 is 73904689311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 73904689311 = 3 ⋅24634896437.

It is a cyclic number.

It is not a de Polignac number, because 11398640937 - 2² = 11398640933 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11398640937.

It is not an unprimeable number, because it can be changed into a prime (11398640933) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1899773487 + ... + 1899773492.

It is an arithmetic number, because the mean of its divisors is an integer number (3799546980).

Almost surely, 2^11398640937 is an apocalyptic number.

It is an amenable number.

11398640937 is a deficient number, since it is larger than the sum of its proper divisors (3799546983).

11398640937 is an equidigital number, since it uses as much as digits as its factorization.

11398640937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3799546982.

The product of its (nonzero) digits is 979776, while the sum is 51.

The spelling of 11398640937 in words is "eleven billion, three hundred ninety-eight million, six hundred forty thousand, nine hundred thirty-seven".