11946388465 has 8 divisors (see below), whose sum is σ = 15638908608. Its totient is φ = 8688282480.

The previous prime is 11946388459. The next prime is 11946388469. The reversal of 11946388465 is 56488364911.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11946388465 - 2³ = 11946388457 is a prime.

It is a super-3 number, since 3×11946388465³ (a number of 31 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (55), and also a Moran number because the ratio is a prime number: 217207063 = 11946388465 / (1 + 1 + 9 + 4 + 6 + 3 + 8 + 8 + 4 + 6 + 5).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11946388469) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108603477 + ... + 108603586.

It is an arithmetic number, because the mean of its divisors is an integer number (1954863576).

Almost surely, 2^11946388465 is an apocalyptic number.

It is an amenable number.

11946388465 is a deficient number, since it is larger than the sum of its proper divisors (3692520143).

11946388465 is a wasteful number, since it uses less digits than its factorization.

11946388465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217207079.

The product of its digits is 4976640, while the sum is 55.

The spelling of 11946388465 in words is "eleven billion, nine hundred forty-six million, three hundred eighty-eight thousand, four hundred sixty-five".