1912154340780 has 192 divisors, whose sum is σ = 5992798694400. Its totient is φ = 506152281600.

The previous prime is 1912154340779. The next prime is 1912154340797. The reversal of 1912154340780 is 870434512191.

1912154340780 is a `hidden beast` number, since 1 + 9 + 1 + 21 + 543 + 4 + 0 + 7 + 80 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 118958824 + ... + 118974896.

It is an arithmetic number, because the mean of its divisors is an integer number (31212493200).

Almost surely, 2^{1912154340780} is an apocalyptic number.

1912154340780 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 1912154340780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2996399347200).

1912154340780 is an abundant number, since it is smaller than the sum of its proper divisors (4080644353620).

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

1912154340780 is a wasteful number, since it uses less digits than its factorization.

1912154340780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17701 (or 17693 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The spelling of 1912154340780 in words is "one trillion, nine hundred twelve billion, one hundred fifty-four million, three hundred forty thousand, seven hundred eighty".