90721672241 has 8 divisors (see below), whose sum is σ = 91570992480. Its totient is φ = 89873167552.

The previous prime is 90721672189. The next prime is 90721672277. The reversal of 90721672241 is 14227612709.

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 90721672241 - 2¹⁸ = 90721410097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90721672141) 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, 20786 + ... + 426468.

It is an arithmetic number, because the mean of its divisors is an integer number (11446374060).

Almost surely, 2^90721672241 is an apocalyptic number.

It is an amenable number.

90721672241 is a deficient number, since it is larger than the sum of its proper divisors (849320239).

90721672241 is a wasteful number, since it uses less digits than its factorization.

90721672241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407775.

The product of its (nonzero) digits is 84672, while the sum is 41.

The spelling of 90721672241 in words is "ninety billion, seven hundred twenty-one million, six hundred seventy-two thousand, two hundred forty-one".