1571116545 has 48 divisors (see below), whose sum is σ = 2876065920. Its totient is φ = 791797248.

The previous prime is 1571116543. The next prime is 1571116553. The reversal of 1571116545 is 5456111751.

It is not a de Polignac number, because 1571116545 - 2¹ = 1571116543 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1571116543) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 76761 + ... + 95049.

It is an arithmetic number, because the mean of its divisors is an integer number (59918040).

Almost surely, 2^1571116545 is an apocalyptic number.

1571116545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1571116545 is a deficient number, since it is larger than the sum of its proper divisors (1304949375).

1571116545 is a wasteful number, since it uses less digits than its factorization.

1571116545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18406 (or 18403 counting only the distinct ones).

The product of its digits is 21000, while the sum is 36.

The square root of 1571116545 is about 39637.3125350345. The cubic root of 1571116545 is about 1162.5263372458.

The spelling of 1571116545 in words is "one billion, five hundred seventy-one million, one hundred sixteen thousand, five hundred forty-five".