11671554440 has 64 divisors (see below), whose sum is σ = 32321237760. Its totient is φ = 3693853440.

The previous prime is 11671554437. The next prime is 11671554443. The reversal of 11671554440 is 4445517611.

It is an interprime number because it is at equal distance from previous prime (11671554437) and next prime (11671554443).

It is a junction number, because it is equal to n+sod(n) for n = 11671554394 and 11671554403.

It is not an unprimeable number, because it can be changed into a prime (11671554443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1599596 + ... + 1606875.

It is an arithmetic number, because the mean of its divisors is an integer number (505019340).

Almost surely, 2^11671554440 is an apocalyptic number.

11671554440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11671554440 is an abundant number, since it is smaller than the sum of its proper divisors (20649683320).

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

11671554440 is a wasteful number, since it uses less digits than its factorization.

11671554440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3206502 (or 3206498 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 38.

The spelling of 11671554440 in words is "eleven billion, six hundred seventy-one million, five hundred fifty-four thousand, four hundred forty".