18377609552 has 80 divisors (see below), whose sum is σ = 39738081600. Its totient is φ = 8182241280.

The previous prime is 18377609527. The next prime is 18377609557. The reversal of 18377609552 is 25590677381.

It is a junction number, because it is equal to n+sod(n) for n = 18377609494 and 18377609503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18377609557) 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, 4861199 + ... + 4864977.

It is an arithmetic number, because the mean of its divisors is an integer number (496726020).

Almost surely, 2^18377609552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18377609552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19869040800).

18377609552 is an abundant number, since it is smaller than the sum of its proper divisors (21360472048).

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

18377609552 is a wasteful number, since it uses less digits than its factorization.

18377609552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4764 (or 4758 counting only the distinct ones).

The product of its (nonzero) digits is 3175200, while the sum is 53.

The spelling of 18377609552 in words is "eighteen billion, three hundred seventy-seven million, six hundred nine thousand, five hundred fifty-two".