90181156641 has 8 divisors (see below), whose sum is σ = 120461364384. Its totient is φ = 60010860000.

The previous prime is 90181156627. The next prime is 90181156661. The reversal of 90181156641 is 14665118109.

It is a happy number.

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

It is not a de Polignac number, because 90181156641 - 2⁹ = 90181156129 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 90181156593 and 90181156602.

It is not an unprimeable number, because it can be changed into a prime (90181156661) 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 7 ways as a sum of consecutive naturals, for example, 27475860 + ... + 27479141.

It is an arithmetic number, because the mean of its divisors is an integer number (15057670548).

Almost surely, 2^90181156641 is an apocalyptic number.

It is an amenable number.

90181156641 is a deficient number, since it is larger than the sum of its proper divisors (30280207743).

90181156641 is a wasteful number, since it uses less digits than its factorization.

90181156641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54955551.

The product of its (nonzero) digits is 51840, while the sum is 42.

The spelling of 90181156641 in words is "ninety billion, one hundred eighty-one million, one hundred fifty-six thousand, six hundred forty-one".