901081231998 has 8 divisors (see below), whose sum is σ = 1802162464008. Its totient is φ = 300360410664.

The previous prime is 901081231991. The next prime is 901081232011. The reversal of 901081231998 is 899132180109.

901081231998 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

901081231998 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 901081231998.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (901081231991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75090102661 + ... + 75090102672.

It is an arithmetic number, because the mean of its divisors is an integer number (225270308001).

Almost surely, 2^901081231998 is an apocalyptic number.

901081231998 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

901081231998 is a wasteful number, since it uses less digits than its factorization.

901081231998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150180205338.

The product of its (nonzero) digits is 279936, while the sum is 51.

The spelling of 901081231998 in words is "nine hundred one billion, eighty-one million, two hundred thirty-one thousand, nine hundred ninety-eight".