377808144921 has 9 divisors (see below), whose sum is σ = 545725539541. Its totient is φ = 251870867292.

The previous prime is 377808144893. The next prime is 377808144953. The reversal of 377808144921 is 129441808773.

The square root of 377808144921 is 614661.

It is a perfect power (a square), and thus also a powerful number.

377808144921 is a `hidden beast` number, since 3 + 7 + 78 + 0 + 81 + 4 + 492 + 1 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 377808144921 - 2⁷ = 377808144793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (377808144991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1741540 + ... + 1946426.

Almost surely, 2^377808144921 is an apocalyptic number.

377808144921 is the 614661-st square number.

377808144921 is the 307331-st centered octagonal number.

It is an amenable number.

377808144921 is a deficient number, since it is larger than the sum of its proper divisors (167917394620).

377808144921 is an frugal number, since it uses more digits than its factorization.

377808144921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409780 (or 204890 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 54.

It can be divided in two parts, 377808 and 144921, that added together give a square (522729 = 723²).

The spelling of 377808144921 in words is "three hundred seventy-seven billion, eight hundred eight million, one hundred forty-four thousand, nine hundred twenty-one".