18265137660 has 768 divisors, whose sum is σ = 75246796800. Its totient is φ = 3565900800.

The previous prime is 18265137641. The next prime is 18265137661. The reversal of 18265137660 is 6673156281.

18265137660 is a `hidden beast` number, since 1 + 8 + 2 + 6 + 513 + 76 + 60 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18265137661) by changing a digit.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 67900006 + ... + 67900274.

It is an arithmetic number, because the mean of its divisors is an integer number (97977600).

Almost surely, 2^18265137660 is an apocalyptic number.

18265137660 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 18265137660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37623398400).

18265137660 is an abundant number, since it is smaller than the sum of its proper divisors (56981659140).

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

18265137660 is a wasteful number, since it uses less digits than its factorization.

18265137660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399 (or 391 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The spelling of 18265137660 in words is "eighteen billion, two hundred sixty-five million, one hundred thirty-seven thousand, six hundred sixty".