1921140182472 has 256 divisors, whose sum is σ = 5681550643200. Its totient is φ = 529996538880.

The previous prime is 1921140182453. The next prime is 1921140182513. The reversal of 1921140182472 is 2742810411291.

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

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, 530260453 + ... + 530264075.

It is an arithmetic number, because the mean of its divisors is an integer number (22193557200).

Almost surely, 2^{1921140182472} is an apocalyptic number.

1921140182472 is a gapful number since it is divisible by the number (12) 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 1921140182472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2840775321600).

1921140182472 is an abundant number, since it is smaller than the sum of its proper divisors (3760410460728).

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

1921140182472 is a wasteful number, since it uses less digits than its factorization.

1921140182472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4636 (or 4632 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 42.

The spelling of 1921140182472 in words is "one trillion, nine hundred twenty-one billion, one hundred forty million, one hundred eighty-two thousand, four hundred seventy-two".