89971547406 has 32 divisors (see below), whose sum is σ = 194018768160. Its totient is φ = 27650139264.

The previous prime is 89971547389. The next prime is 89971547431. The reversal of 89971547406 is 60474517998.

It is a self number, because there is not a number n which added to its sum of digits gives 89971547406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 631045 + ... + 760368.

It is an arithmetic number, because the mean of its divisors is an integer number (6063086505).

Almost surely, 2^89971547406 is an apocalyptic number.

89971547406 is an abundant number, since it is smaller than the sum of its proper divisors (104047220754).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

89971547406 is a wasteful number, since it uses less digits than its factorization.

89971547406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1392260.

The product of its (nonzero) digits is 15240960, while the sum is 60.

The spelling of 89971547406 in words is "eighty-nine billion, nine hundred seventy-one million, five hundred forty-seven thousand, four hundred six".