84187748720 has 40 divisors (see below), whose sum is σ = 201026698944. Its totient is φ = 32764960512.

The previous prime is 84187748719. The next prime is 84187748741. The reversal of 84187748720 is 2784778148.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14217944 + ... + 14223863.

Almost surely, 2^84187748720 is an apocalyptic number.

84187748720 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

84187748720 is an abundant number, since it is smaller than the sum of its proper divisors (116838950224).

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

84187748720 is a wasteful number, since it uses less digits than its factorization.

84187748720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28441857 (or 28441851 counting only the distinct ones).

The product of its (nonzero) digits is 5619712, while the sum is 56.

The spelling of 84187748720 in words is "eighty-four billion, one hundred eighty-seven million, seven hundred forty-eight thousand, seven hundred twenty".