84172535420 has 12 divisors (see below), whose sum is σ = 176762324424. Its totient is φ = 33669014160.

The previous prime is 84172535411. The next prime is 84172535479. The reversal of 84172535420 is 2453527148.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2104313366 + ... + 2104313405.

It is an arithmetic number, because the mean of its divisors is an integer number (14730193702).

Almost surely, 2^84172535420 is an apocalyptic number.

It is an amenable number.

84172535420 is an abundant number, since it is smaller than the sum of its proper divisors (92589789004).

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

84172535420 is a wasteful number, since it uses less digits than its factorization.

84172535420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4208626780 (or 4208626778 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 41.

The spelling of 84172535420 in words is "eighty-four billion, one hundred seventy-two million, five hundred thirty-five thousand, four hundred twenty".