1642101887 has 16 divisors (see below), whose sum is σ = 1723680000. Its totient is φ = 1562313984.

The previous prime is 1642101833. The next prime is 1642101907. The reversal of 1642101887 is 7881012461.

It is a happy number.

It is not a de Polignac number, because 1642101887 - 2²⁸ = 1373666431 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 1642101887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642101827) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 899858 + ... + 901680.

It is an arithmetic number, because the mean of its divisors is an integer number (107730000).

Almost surely, 2^1642101887 is an apocalyptic number.

1642101887 is a deficient number, since it is larger than the sum of its proper divisors (81578113).

1642101887 is a wasteful number, since it uses less digits than its factorization.

1642101887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2290.

The product of its (nonzero) digits is 21504, while the sum is 38.

The square root of 1642101887 is about 40522.8563529275. The cubic root of 1642101887 is about 1179.7772937455. Note that the first 3 decimals are identical.

The spelling of 1642101887 in words is "one billion, six hundred forty-two million, one hundred one thousand, eight hundred eighty-seven".