90702562481 has 8 divisors (see below), whose sum is σ = 90785974440. Its totient is φ = 90619187328.

The previous prime is 90702562477. The next prime is 90702562513. The reversal of 90702562481 is 18426520709.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7767778225 + 82934784256 = 88135^2 + 287984^2 .

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 90702562481 - 2² = 90702562477 is a prime.

It is a super-2 number, since 2×90702562481² (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 (90702562451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7454855 + ... + 7467011.

It is an arithmetic number, because the mean of its divisors is an integer number (11348246805).

Almost surely, 2^90702562481 is an apocalyptic number.

It is an amenable number.

90702562481 is a deficient number, since it is larger than the sum of its proper divisors (83411959).

90702562481 is a wasteful number, since it uses less digits than its factorization.

90702562481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18403.

The product of its (nonzero) digits is 241920, while the sum is 44.

The spelling of 90702562481 in words is "ninety billion, seven hundred two million, five hundred sixty-two thousand, four hundred eighty-one".