84138055291 has 8 divisors (see below), whose sum is σ = 87868640160. Its totient is φ = 80413504512.

The previous prime is 84138055277. The next prime is 84138055303. The reversal of 84138055291 is 19255083148.

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 84138055291 - 2⁵ = 84138055259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84138055271) 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, 1480006 + ... + 1535803.

It is an arithmetic number, because the mean of its divisors is an integer number (10983580020).

Almost surely, 2^84138055291 is an apocalyptic number.

84138055291 is a deficient number, since it is larger than the sum of its proper divisors (3730584869).

84138055291 is a wasteful number, since it uses less digits than its factorization.

84138055291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3017045.

The product of its (nonzero) digits is 345600, while the sum is 46.

The spelling of 84138055291 in words is "eighty-four billion, one hundred thirty-eight million, fifty-five thousand, two hundred ninety-one".