90541437538 has 8 divisors (see below), whose sum is σ = 143801106732. Its totient is φ = 42607735296.

The previous prime is 90541437533. The next prime is 90541437617. The reversal of 90541437538 is 83573414509.

It can be written as a sum of positive squares in 2 ways, for example, as 72074530089 + 18466907449 = 268467^2 + 135893^2 .

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

It is a super-2 number, since 2×90541437538² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 90541437491 and 90541437500.

It is not an unprimeable number, because it can be changed into a prime (90541437533) 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, 1331491695 + ... + 1331491762.

Almost surely, 2^90541437538 is an apocalyptic number.

90541437538 is a deficient number, since it is larger than the sum of its proper divisors (53259669194).

90541437538 is a wasteful number, since it uses less digits than its factorization.

90541437538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2662983476.

The product of its (nonzero) digits is 1814400, while the sum is 49.

The spelling of 90541437538 in words is "ninety billion, five hundred forty-one million, four hundred thirty-seven thousand, five hundred thirty-eight".