1642505860 has 24 divisors (see below), whose sum is σ = 3560530176. Its totient is φ = 635808480.

The previous prime is 1642505803. The next prime is 1642505861. The reversal of 1642505860 is 685052461.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1642505861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1323982 + ... + 1325221.

It is an arithmetic number, because the mean of its divisors is an integer number (148355424).

Almost surely, 2^1642505860 is an apocalyptic number.

1642505860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1642505860 is an abundant number, since it is smaller than the sum of its proper divisors (1918024316).

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

1642505860 is a wasteful number, since it uses less digits than its factorization.

1642505860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2649243 (or 2649241 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 37.

The square root of 1642505860 is about 40527.8405543646. The cubic root of 1642505860 is about 1179.8740313676.

The spelling of 1642505860 in words is "one billion, six hundred forty-two million, five hundred five thousand, eight hundred sixty".