81140714148 has 24 divisors (see below), whose sum is σ = 203892051328. Its totient is φ = 24966373536.

The previous prime is 81140714143. The next prime is 81140714191. The reversal of 81140714148 is 84141704118.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (81140714143) 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, 260066236 + ... + 260066547.

Almost surely, 2^81140714148 is an apocalyptic number.

It is an amenable number.

81140714148 is an abundant number, since it is smaller than the sum of its proper divisors (122751337180).

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

81140714148 is a wasteful number, since it uses less digits than its factorization.

81140714148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520132803 (or 520132801 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 39.

The spelling of 81140714148 in words is "eighty-one billion, one hundred forty million, seven hundred fourteen thousand, one hundred forty-eight".