81848900154 has 16 divisors (see below), whose sum is σ = 187083200448. Its totient is φ = 23385400032.

The previous prime is 81848900153. The next prime is 81848900173. The reversal of 81848900154 is 45100984818.

It is a super-2 number, since 2×81848900154² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (81848900153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 974391627 + ... + 974391710.

It is an arithmetic number, because the mean of its divisors is an integer number (11692700028).

Almost surely, 2^81848900154 is an apocalyptic number.

81848900154 is an abundant number, since it is smaller than the sum of its proper divisors (105234300294).

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

81848900154 is a wasteful number, since it uses less digits than its factorization.

81848900154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1948783349.

The product of its (nonzero) digits is 368640, while the sum is 48.

The spelling of 81848900154 in words is "eighty-one billion, eight hundred forty-eight million, nine hundred thousand, one hundred fifty-four".