90921990010 has 8 divisors (see below), whose sum is σ = 163659582036. Its totient is φ = 36368796000.

The previous prime is 90921989999. The next prime is 90921990011. The reversal of 90921990010 is 1009912909.

It can be written as a sum of positive squares in 2 ways, for example, as 89578694209 + 1343295801 = 299297^2 + 36651^2 .

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

It is not an unprimeable number, because it can be changed into a prime (90921990011) 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, 4546099491 + ... + 4546099510.

Almost surely, 2^90921990010 is an apocalyptic number.

90921990010 is a deficient number, since it is larger than the sum of its proper divisors (72737592026).

90921990010 is a wasteful number, since it uses less digits than its factorization.

90921990010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9092199008.

The product of its (nonzero) digits is 13122, while the sum is 40.

The spelling of 90921990010 in words is "ninety billion, nine hundred twenty-one million, nine hundred ninety thousand, ten".