1916220726420 has 1152 divisors, whose sum is σ = 7918694203392. Its totient is φ = 334695628800.

The previous prime is 1916220726397. The next prime is 1916220726439. The reversal of 1916220726420 is 246270226191.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 411468732 + ... + 411473388.

It is an arithmetic number, because the mean of its divisors is an integer number (6873866496).

Almost surely, 2^{1916220726420} is an apocalyptic number.

1916220726420 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 1916220726420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3959347101696).

1916220726420 is an abundant number, since it is smaller than the sum of its proper divisors (6002473476972).

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

1916220726420 is a wasteful number, since it uses less digits than its factorization.

1916220726420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4761 (or 4746 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 42.

The spelling of 1916220726420 in words is "one trillion, nine hundred sixteen billion, two hundred twenty million, seven hundred twenty-six thousand, four hundred twenty".