90746140081 has 3 divisors (see below), whose sum is σ = 90746441323. Its totient is φ = 90745838840.

The previous prime is 90746140021. The next prime is 90746140099. The reversal of 90746140081 is 18004164709.

The square root of 90746140081 is 301241.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 18004164709 = 313 ⋅57521293.

It can be written as a sum of positive squares in only one way, i.e., 36401205681 + 54344934400 = 190791^2 + 233120^2 .

It is not a de Polignac number, because 90746140081 - 2¹⁷ = 90746009009 is a prime.

It is a super-2 number, since 2×90746140081² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90746140021) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 150621 + ... + 451861.

Almost surely, 2^90746140081 is an apocalyptic number.

90746140081 is the 301241-st square number.

90746140081 is the 150621-st centered octagonal number.

It is an amenable number.

90746140081 is a deficient number, since it is larger than the sum of its proper divisors (301242).

90746140081 is an frugal number, since it uses more digits than its factorization.

90746140081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602482 (or 301241 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 40.

The spelling of 90746140081 in words is "ninety billion, seven hundred forty-six million, one hundred forty thousand, eighty-one".