18457557440 has 112 divisors (see below), whose sum is σ = 50271224832. Its totient is φ = 6323229696.

The previous prime is 18457557439. The next prime is 18457557493. The reversal of 18457557440 is 4475575481.

It is a tau number, because it is divible by the number of its divisors (112).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3731609 + ... + 3736551.

Almost surely, 2^18457557440 is an apocalyptic number.

18457557440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18457557440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25135612416).

18457557440 is an abundant number, since it is smaller than the sum of its proper divisors (31813667392).

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

18457557440 is a wasteful number, since it uses less digits than its factorization.

18457557440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6634 (or 6624 counting only the distinct ones).

The product of its (nonzero) digits is 3136000, while the sum is 50.

The spelling of 18457557440 in words is "eighteen billion, four hundred fifty-seven million, five hundred fifty-seven thousand, four hundred forty".