1812170542 has 32 divisors (see below), whose sum is σ = 3391399872. Its totient is φ = 707076864.

The previous prime is 1812170537. The next prime is 1812170557. The reversal of 1812170542 is 2450712181.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54913 + ... + 81484.

It is an arithmetic number, because the mean of its divisors is an integer number (105981246).

Almost surely, 2^1812170542 is an apocalyptic number.

1812170542 is a deficient number, since it is larger than the sum of its proper divisors (1579229330).

1812170542 is a wasteful number, since it uses less digits than its factorization.

1812170542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136492.

The product of its (nonzero) digits is 4480, while the sum is 31.

The square root of 1812170542 is about 42569.5964509884. The cubic root of 1812170542 is about 1219.1758614781.

The spelling of 1812170542 in words is "one billion, eight hundred twelve million, one hundred seventy thousand, five hundred forty-two".