90551362440 has 512 divisors, whose sum is σ = 350078423040. Its totient is φ = 18189619200.

The previous prime is 90551362399. The next prime is 90551362523. The reversal of 90551362440 is 4426315509.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 59144475 + ... + 59146005.

It is an arithmetic number, because the mean of its divisors is an integer number (683746920).

Almost surely, 2^90551362440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90551362440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (175039211520).

90551362440 is an abundant number, since it is smaller than the sum of its proper divisors (259527060600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

90551362440 is a wasteful number, since it uses less digits than its factorization.

90551362440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1773 (or 1769 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 39.

Adding to 90551362440 its reverse (4426315509), we get a palindrome (94977677949).

The spelling of 90551362440 in words is "ninety billion, five hundred fifty-one million, three hundred sixty-two thousand, four hundred forty".