1954043806512 has 320 divisors, whose sum is σ = 5925380751360. Its totient is φ = 543404160000.

The previous prime is 1954043806501. The next prime is 1954043806523. The reversal of 1954043806512 is 2156083404591.

It is an interprime number because it is at equal distance from previous prime (1954043806501) and next prime (1954043806523).

It is a super-2 number, since 2×1954043806512² (a number of 25 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1654566562 + ... + 1654567742.

It is an arithmetic number, because the mean of its divisors is an integer number (18516814848).

Almost surely, 2^{1954043806512} is an apocalyptic number.

1954043806512 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 1954043806512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2962690375680).

1954043806512 is an abundant number, since it is smaller than the sum of its proper divisors (3971336944848).

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

1954043806512 is a wasteful number, since it uses less digits than its factorization.

1954043806512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2112 (or 2106 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 48.

The spelling of 1954043806512 in words is "one trillion, nine hundred fifty-four billion, forty-three million, eight hundred six thousand, five hundred twelve".