1444557377 has 4 divisors (see below), whose sum is σ = 1445175216. Its totient is φ = 1443939540.

The previous prime is 1444557341. The next prime is 1444557421. The reversal of 1444557377 is 7737554441.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7737554441 = 37 ⋅209123093.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1444557377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1444557307) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 305399 + ... + 310092.

It is an arithmetic number, because the mean of its divisors is an integer number (361293804).

Almost surely, 2^1444557377 is an apocalyptic number.

It is an amenable number.

1444557377 is a deficient number, since it is larger than the sum of its proper divisors (617839).

1444557377 is an equidigital number, since it uses as much as digits as its factorization.

1444557377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617838.

The product of its digits is 1646400, while the sum is 47.

The square root of 1444557377 is about 38007.3332003181. Note that the first 3 decimals coincide. The cubic root of 1444557377 is about 1130.4332734299.

The spelling of 1444557377 in words is "one billion, four hundred forty-four million, five hundred fifty-seven thousand, three hundred seventy-seven".