90401491594 has 4 divisors (see below), whose sum is σ = 135602237394. Its totient is φ = 45200745796.

The previous prime is 90401491561. The next prime is 90401491597. The reversal of 90401491594 is 49519410409.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 89229456369 + 1172035225 = 298713^2 + 34235^2 .

It is not an unprimeable number, because it can be changed into a prime (90401491597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22600372897 + ... + 22600372900.

Almost surely, 2^90401491594 is an apocalyptic number.

90401491594 is a deficient number, since it is larger than the sum of its proper divisors (45200745800).

90401491594 is a wasteful number, since it uses less digits than its factorization.

90401491594 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45200745799.

The product of its (nonzero) digits is 233280, while the sum is 46.

The spelling of 90401491594 in words is "ninety billion, four hundred one million, four hundred ninety-one thousand, five hundred ninety-four".