90909357481649 has 8 divisors (see below), whose sum is σ = 103906684213248. Its totient is φ = 77914599665760.

The previous prime is 90909357481619. The next prime is 90909357481819. The reversal of 90909357481649 is 94618475390909.

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

It is a cyclic number.

It is not a de Polignac number, because 90909357481649 - 2¹² = 90909357477553 is a prime.

It is a super-2 number, since 2×90909357481649² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (90909357481619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 642153092 + ... + 642294645.

It is an arithmetic number, because the mean of its divisors is an integer number (12988335526656).

Almost surely, 2^{90909357481649} is an apocalyptic number.

It is an amenable number.

90909357481649 is a deficient number, since it is larger than the sum of its proper divisors (12997326731599).

90909357481649 is a wasteful number, since it uses less digits than its factorization.

90909357481649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1284457855.

The product of its (nonzero) digits is 529079040, while the sum is 74.

The spelling of 90909357481649 in words is "ninety trillion, nine hundred nine billion, three hundred fifty-seven million, four hundred eighty-one thousand, six hundred forty-nine".