81295367248 has 40 divisors (see below), whose sum is σ = 163114747488. Its totient is φ = 39224019072.

The previous prime is 81295367243. The next prime is 81295367249. The reversal of 81295367248 is 84276359218.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81295367243) 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, 654715 + ... + 768922.

Almost surely, 2^81295367248 is an apocalyptic number.

It is an amenable number.

81295367248 is an abundant number, since it is smaller than the sum of its proper divisors (81819380240).

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

81295367248 is a wasteful number, since it uses less digits than its factorization.

81295367248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1423771 (or 1423765 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 55.

The spelling of 81295367248 in words is "eighty-one billion, two hundred ninety-five million, three hundred sixty-seven thousand, two hundred forty-eight".