1538617671 has 24 divisors (see below), whose sum is σ = 2262480480. Its totient is φ = 1007424000.

The previous prime is 1538617631. The next prime is 1538617687. The reversal of 1538617671 is 1767168351.

It is not a de Polignac number, because 1538617671 - 2¹¹ = 1538615623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1538617601) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 114591 + ... + 127311.

It is an arithmetic number, because the mean of its divisors is an integer number (94270020).

Almost surely, 2^1538617671 is an apocalyptic number.

1538617671 is a deficient number, since it is larger than the sum of its proper divisors (723862809).

1538617671 is a wasteful number, since it uses less digits than its factorization.

1538617671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12967 (or 12964 counting only the distinct ones).

The product of its digits is 211680, while the sum is 45.

The square root of 1538617671 is about 39225.2172842930. The cubic root of 1538617671 is about 1154.4547243440.

The spelling of 1538617671 in words is "one billion, five hundred thirty-eight million, six hundred seventeen thousand, six hundred seventy-one".