1881920424477 has 16 divisors (see below), whose sum is σ = 2609942353920. Its totient is φ = 1204873940400.

The previous prime is 1881920424403. The next prime is 1881920424479. The reversal of 1881920424477 is 7744240291881.

It is a happy number.

It is not a de Polignac number, because 1881920424477 - 2¹¹ = 1881920422429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1881920424479) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77223327 + ... + 77247692.

It is an arithmetic number, because the mean of its divisors is an integer number (163121397120).

Almost surely, 2^{1881920424477} is an apocalyptic number.

It is an amenable number.

1881920424477 is a deficient number, since it is larger than the sum of its proper divisors (728021929443).

1881920424477 is a wasteful number, since it uses less digits than its factorization.

1881920424477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154471184.

The product of its (nonzero) digits is 7225344, while the sum is 57.

The spelling of 1881920424477 in words is "one trillion, eight hundred eighty-one billion, nine hundred twenty million, four hundred twenty-four thousand, four hundred seventy-seven".