1671142956 has 24 divisors (see below), whose sum is σ = 4456381440. Its totient is φ = 477469392.

The previous prime is 1671142931. The next prime is 1671142973. The reversal of 1671142956 is 6592411761.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 9947196 + ... + 9947363.

It is an arithmetic number, because the mean of its divisors is an integer number (185682560).

Almost surely, 2^1671142956 is an apocalyptic number.

It is an amenable number.

1671142956 is an abundant number, since it is smaller than the sum of its proper divisors (2785238484).

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

1671142956 is a wasteful number, since it uses less digits than its factorization.

1671142956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19894573 (or 19894571 counting only the distinct ones).

The product of its digits is 90720, while the sum is 42.

The square root of 1671142956 is about 40879.6154091498. The cubic root of 1671142956 is about 1186.6915982151.

The spelling of 1671142956 in words is "one billion, six hundred seventy-one million, one hundred forty-two thousand, nine hundred fifty-six".