1577221442147 has 32 divisors (see below), whose sum is σ = 1870648141824. Its totient is φ = 1315930636800.

The previous prime is 1577221442119. The next prime is 1577221442161. The reversal of 1577221442147 is 7412441227751.

It is not a de Polignac number, because 1577221442147 - 2⁸ = 1577221441891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1577221442117) 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 31 ways as a sum of consecutive naturals, for example, 18788 + ... + 1776174.

It is an arithmetic number, because the mean of its divisors is an integer number (58457754432).

Almost surely, 2^{1577221442147} is an apocalyptic number.

1577221442147 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1577221442147 is a deficient number, since it is larger than the sum of its proper divisors (293426699677).

1577221442147 is a wasteful number, since it uses less digits than its factorization.

1577221442147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1757579.

The product of its digits is 878080, while the sum is 47.

Adding to 1577221442147 its reverse (7412441227751), we get a palindrome (8989662669898).

The spelling of 1577221442147 in words is "one trillion, five hundred seventy-seven billion, two hundred twenty-one million, four hundred forty-two thousand, one hundred forty-seven".