84154738821 has 8 divisors (see below), whose sum is σ = 112854910560. Its totient is φ = 55778863152.

The previous prime is 84154738651. The next prime is 84154738891. The reversal of 84154738821 is 12883745148.

It is a happy number.

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

It is not a de Polignac number, because 84154738821 - 2¹¹ = 84154736773 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84154738891) 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, 81073411 + ... + 81074448.

It is an arithmetic number, because the mean of its divisors is an integer number (14106863820).

Almost surely, 2^84154738821 is an apocalyptic number.

It is an amenable number.

84154738821 is a deficient number, since it is larger than the sum of its proper divisors (28700171739).

84154738821 is a wasteful number, since it uses less digits than its factorization.

84154738821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162148035.

The product of its digits is 1720320, while the sum is 51.

The spelling of 84154738821 in words is "eighty-four billion, one hundred fifty-four million, seven hundred thirty-eight thousand, eight hundred twenty-one".