212174785555440 has 160 divisors (see below), whose sum is σ = 668605310188032. Its totient is φ = 55645674624000.

The previous prime is 212174785555399. The next prime is 212174785555477. The reversal of 212174785555440 is 44555587471212.

It is a happy number.

212174785555440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 120801135 + ... + 122544945.

Almost surely, 2^{212174785555440} is an apocalyptic number.

212174785555440 is a gapful number since it is divisible by the number (20) 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 212174785555440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (334302655094016).

212174785555440 is an abundant number, since it is smaller than the sum of its proper divisors (456430524632592).

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

212174785555440 is a wasteful number, since it uses less digits than its factorization.

212174785555440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1752199 (or 1752193 counting only the distinct ones).

The product of its (nonzero) digits is 62720000, while the sum is 60.

The spelling of 212174785555440 in words is "two hundred twelve trillion, one hundred seventy-four billion, seven hundred eighty-five million, five hundred fifty-five thousand, four hundred forty".