1642518408 has 32 divisors (see below), whose sum is σ = 4107391200. Its totient is φ = 547360128.

The previous prime is 1642518401. The next prime is 1642518413. The reversal of 1642518408 is 8048152461.

It is not an unprimeable number, because it can be changed into a prime (1642518401) 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, 120063 + ... + 133041.

It is an arithmetic number, because the mean of its divisors is an integer number (128355975).

Almost surely, 2^1642518408 is an apocalyptic number.

It is an amenable number.

1642518408 is an abundant number, since it is smaller than the sum of its proper divisors (2464872792).

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

1642518408 is a wasteful number, since it uses less digits than its factorization.

1642518408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18261 (or 18257 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 39.

The square root of 1642518408 is about 40527.9953612315. The cubic root of 1642518408 is about 1179.8770359275.

The spelling of 1642518408 in words is "one billion, six hundred forty-two million, five hundred eighteen thousand, four hundred eight".