11809454064 has 40 divisors (see below), whose sum is σ = 31083381072. Its totient is φ = 3862210560.

The previous prime is 11809454051. The next prime is 11809454077. The reversal of 11809454064 is 46045490811.

It is an interprime number because it is at equal distance from previous prime (11809454051) and next prime (11809454077).

It is a super-2 number, since 2×11809454064² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2318497 + ... + 2323584.

Almost surely, 2^11809454064 is an apocalyptic number.

It is an amenable number.

11809454064 is an abundant number, since it is smaller than the sum of its proper divisors (19273927008).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11809454064 is a wasteful number, since it uses less digits than its factorization.

11809454064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4642145 (or 4642139 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 42.

The spelling of 11809454064 in words is "eleven billion, eight hundred nine million, four hundred fifty-four thousand, sixty-four".