901901801901 has 32 divisors (see below), whose sum is σ = 1226339009280. Its totient is φ = 589435315200.

The previous prime is 901901801893. The next prime is 901901801923. The reversal of 901901801901 is 109108109109.

It is not a de Polignac number, because 901901801901 - 2³ = 901901801893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 901901801901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (901901801501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 77523781 + ... + 77535413.

It is an arithmetic number, because the mean of its divisors is an integer number (38323094040).

Almost surely, 2^901901801901 is an apocalyptic number.

It is an amenable number.

901901801901 is a deficient number, since it is larger than the sum of its proper divisors (324437207379).

901901801901 is a wasteful number, since it uses less digits than its factorization.

901901801901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13077.

The product of its (nonzero) digits is 5832, while the sum is 39.

The spelling of 901901801901 in words is "nine hundred one billion, nine hundred one million, eight hundred one thousand, nine hundred one".