1855372656 has 80 divisors (see below), whose sum is σ = 5097664800. Its totient is φ = 579477504.

The previous prime is 1855372619. The next prime is 1855372657. The reversal of 1855372656 is 6562735581.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1855372657) 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, 181900 + ... + 191828.

It is an arithmetic number, because the mean of its divisors is an integer number (63720810).

Almost surely, 2^1855372656 is an apocalyptic number.

1855372656 is a gapful number since it is divisible by the number (16) 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 1855372656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2548832400).

1855372656 is an abundant number, since it is smaller than the sum of its proper divisors (3242292144).

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

1855372656 is a wasteful number, since it uses less digits than its factorization.

1855372656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10186 (or 10180 counting only the distinct ones).

The product of its digits is 1512000, while the sum is 48.

The square root of 1855372656 is about 43074.0369132033. The cubic root of 1855372656 is about 1228.7882520612.

The spelling of 1855372656 in words is "one billion, eight hundred fifty-five million, three hundred seventy-two thousand, six hundred fifty-six".