90986618421 has 12 divisors (see below), whose sum is σ = 131458804672. Its totient is φ = 60642196776.

The previous prime is 90986618377. The next prime is 90986618441. The reversal of 90986618421 is 12481668909.

It is not a de Polignac number, because 90986618421 - 2¹³ = 90986610229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90986618441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1258621 + ... + 1328946.

Almost surely, 2^90986618421 is an apocalyptic number.

It is an amenable number.

90986618421 is a deficient number, since it is larger than the sum of its proper divisors (40472186251).

90986618421 is a wasteful number, since it uses less digits than its factorization.

90986618421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2591480 (or 2591477 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 54.

The spelling of 90986618421 in words is "ninety billion, nine hundred eighty-six million, six hundred eighteen thousand, four hundred twenty-one".