1642539612 has 48 divisors (see below), whose sum is σ = 4384378880. Its totient is φ = 468839232.

The previous prime is 1642539601. The next prime is 1642539623. The reversal of 1642539612 is 2169352461.

It is an interprime number because it is at equal distance from previous prime (1642539601) and next prime (1642539623).

It is a super-2 number, since 2×1642539612² = 5395872753978221088, which contains 22 as substring.

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, 82314 + ... + 100302.

Almost surely, 2^1642539612 is an apocalyptic number.

1642539612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1642539612 is an abundant number, since it is smaller than the sum of its proper divisors (2741839268).

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

1642539612 is a wasteful number, since it uses less digits than its factorization.

1642539612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19090 (or 19088 counting only the distinct ones).

The product of its digits is 77760, while the sum is 39.

The square root of 1642539612 is about 40528.2569573378. The cubic root of 1642539612 is about 1179.8821130913.

The spelling of 1642539612 in words is "one billion, six hundred forty-two million, five hundred thirty-nine thousand, six hundred twelve".