90651931487 has 8 divisors (see below), whose sum is σ = 98370389040. Its totient is φ = 83039935680.

The previous prime is 90651931471. The next prime is 90651931493. The reversal of 90651931487 is 78413915609.

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

It is not a de Polignac number, because 90651931487 - 2⁴ = 90651931471 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 (90651931787) 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, 26613662 + ... + 26617067.

It is an arithmetic number, because the mean of its divisors is an integer number (12296298630).

Almost surely, 2^90651931487 is an apocalyptic number.

90651931487 is a deficient number, since it is larger than the sum of its proper divisors (7718457553).

90651931487 is a wasteful number, since it uses less digits than its factorization.

90651931487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53230873.

The product of its (nonzero) digits is 1632960, while the sum is 53.

The spelling of 90651931487 in words is "ninety billion, six hundred fifty-one million, nine hundred thirty-one thousand, four hundred eighty-seven".