1575116172 has 72 divisors (see below), whose sum is σ = 4750366320. Its totient is φ = 450031680.

The previous prime is 1575116171. The next prime is 1575116173. The reversal of 1575116172 is 2716115751.

It is a happy number.

1575116172 is a `hidden beast` number, since 1 + 575 + 1 + 16 + 1 + 72 = 666.

It is an interprime number because it is at equal distance from previous prime (1575116171) and next prime (1575116173).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1575116171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 143529 + ... + 154112.

It is an arithmetic number, because the mean of its divisors is an integer number (65977310).

Almost surely, 2^1575116172 is an apocalyptic number.

1575116172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1575116172 is an abundant number, since it is smaller than the sum of its proper divisors (3175250148).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1575116172 is a wasteful number, since it uses less digits than its factorization.

1575116172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297668 (or 297653 counting only the distinct ones).

The product of its digits is 14700, while the sum is 36.

The square root of 1575116172 is about 39687.7332686058. The cubic root of 1575116172 is about 1163.5119912002.

The spelling of 1575116172 in words is "one billion, five hundred seventy-five million, one hundred sixteen thousand, one hundred seventy-two".