1577172045 has 16 divisors (see below), whose sum is σ = 2656290240. Its totient is φ = 796886784.

The previous prime is 1577172001. The next prime is 1577172049. The reversal of 1577172045 is 5402717751.

It is a happy number.

It is not a de Polignac number, because 1577172045 - 2¹⁴ = 1577155661 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1577171994 and 1577172012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1577172049) 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, 2766684 + ... + 2767253.

It is an arithmetic number, because the mean of its divisors is an integer number (166018140).

Almost surely, 2^1577172045 is an apocalyptic number.

1577172045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1577172045 is a deficient number, since it is larger than the sum of its proper divisors (1079118195).

1577172045 is a wasteful number, since it uses less digits than its factorization.

1577172045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5533964.

The product of its (nonzero) digits is 68600, while the sum is 39.

The square root of 1577172045 is about 39713.6254325893. The cubic root of 1577172045 is about 1164.0179841283.

Adding to 1577172045 its reverse (5402717751), we get a palindrome (6979889796).

The spelling of 1577172045 in words is "one billion, five hundred seventy-seven million, one hundred seventy-two thousand, forty-five".