90401326191861 has 8 divisors (see below), whose sum is σ = 120535444151424. Its totient is φ = 60267379513440.

The previous prime is 90401326191857. The next prime is 90401326191889. The reversal of 90401326191861 is 16819162310409.

It is a happy number.

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

It is not a de Polignac number, because 90401326191861 - 2² = 90401326191857 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90401326191821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41583661 + ... + 43703586.

It is an arithmetic number, because the mean of its divisors is an integer number (15066930518928).

Almost surely, 2^{90401326191861} is an apocalyptic number.

It is an amenable number.

90401326191861 is a deficient number, since it is larger than the sum of its proper divisors (30134117959563).

90401326191861 is a wasteful number, since it uses less digits than its factorization.

90401326191861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85640571.

The product of its (nonzero) digits is 559872, while the sum is 51.

The spelling of 90401326191861 in words is "ninety trillion, four hundred one billion, three hundred twenty-six million, one hundred ninety-one thousand, eight hundred sixty-one".