1872561801 has 16 divisors (see below), whose sum is σ = 2733432768. Its totient is φ = 1130841600.

The previous prime is 1872561773. The next prime is 1872561833. The reversal of 1872561801 is 1081652781.

It is not a de Polignac number, because 1872561801 - 2⁷ = 1872561673 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1872561801.

It is not an unprimeable number, because it can be changed into a prime (1872561401) 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, 91696 + ... + 110241.

It is an arithmetic number, because the mean of its divisors is an integer number (170839548).

Almost surely, 2^1872561801 is an apocalyptic number.

1872561801 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1872561801 is a deficient number, since it is larger than the sum of its proper divisors (860870967).

1872561801 is a wasteful number, since it uses less digits than its factorization.

1872561801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202232.

The product of its (nonzero) digits is 26880, while the sum is 39.

The square root of 1872561801 is about 43273.1071336459. The cubic root of 1872561801 is about 1232.5713061316.

The spelling of 1872561801 in words is "one billion, eight hundred seventy-two million, five hundred sixty-one thousand, eight hundred one".