90344421427 has 16 divisors (see below), whose sum is σ = 103962307680. Its totient is φ = 77769165312.

The previous prime is 90344421373. The next prime is 90344421443. The reversal of 90344421427 is 72412444309.

It is a cyclic number.

It is not a de Polignac number, because 90344421427 - 2²³ = 90336032819 is a prime.

It is a super-2 number, since 2×90344421427² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90344421427.

It is not an unprimeable number, because it can be changed into a prime (90344421527) 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 15 ways as a sum of consecutive naturals, for example, 1851133 + ... + 1899310.

It is an arithmetic number, because the mean of its divisors is an integer number (6497644230).

Almost surely, 2^90344421427 is an apocalyptic number.

90344421427 is a deficient number, since it is larger than the sum of its proper divisors (13617886253).

90344421427 is a wasteful number, since it uses less digits than its factorization.

90344421427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3750582.

The product of its (nonzero) digits is 193536, while the sum is 40.

The spelling of 90344421427 in words is "ninety billion, three hundred forty-four million, four hundred twenty-one thousand, four hundred twenty-seven".