185421964080 has 160 divisors (see below), whose sum is σ = 599469631488. Its totient is φ = 47357337600.

The previous prime is 185421964009. The next prime is 185421964087. The reversal of 185421964080 is 80469124581.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (185421964087) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 593215 + ... + 850145.

Almost surely, 2^185421964080 is an apocalyptic number.

185421964080 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 185421964080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (299734815744).

185421964080 is an abundant number, since it is smaller than the sum of its proper divisors (414047667408).

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

185421964080 is a wasteful number, since it uses less digits than its factorization.

185421964080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257075 (or 257069 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 48.

The spelling of 185421964080 in words is "one hundred eighty-five billion, four hundred twenty-one million, nine hundred sixty-four thousand, eighty".