101800431887 has 8 divisors (see below), whose sum is σ = 126920019072. Its totient is φ = 79325011800.

The previous prime is 101800431857. The next prime is 101800431907. The reversal of 101800431887 is 788134008101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 101800431887 - 2⁸ = 101800431631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101800431827) 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, 661041689 + ... + 661041842.

It is an arithmetic number, because the mean of its divisors is an integer number (15865002384).

Almost surely, 2^101800431887 is an apocalyptic number.

101800431887 is a deficient number, since it is larger than the sum of its proper divisors (25119587185).

101800431887 is a wasteful number, since it uses less digits than its factorization.

101800431887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1322083549.

The product of its (nonzero) digits is 43008, while the sum is 41.

Adding to 101800431887 its reverse (788134008101), we get a palindrome (889934439988).

The spelling of 101800431887 in words is "one hundred one billion, eight hundred million, four hundred thirty-one thousand, eight hundred eighty-seven".