1921182016860 has 36 divisors (see below), whose sum is σ = 5827585451688. Its totient is φ = 512315204448.

The previous prime is 1921182016843. The next prime is 1921182016879. The reversal of 1921182016860 is 686102811291.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5336616534 + ... + 5336616893.

It is an arithmetic number, because the mean of its divisors is an integer number (161877373658).

Almost surely, 2^{1921182016860} is an apocalyptic number.

1921182016860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1921182016860 is an abundant number, since it is smaller than the sum of its proper divisors (3906403434828).

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

1921182016860 is a wasteful number, since it uses less digits than its factorization.

1921182016860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10673233442 (or 10673233437 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 45.

The spelling of 1921182016860 in words is "one trillion, nine hundred twenty-one billion, one hundred eighty-two million, sixteen thousand, eight hundred sixty".