81043647654270 has 64 divisors (see below), whose sum is σ = 222326196618240. Its totient is φ = 18521341590528.

The previous prime is 81043647654253. The next prime is 81043647654283. The reversal of 81043647654270 is 7245674634018.

It is a self number, because there is not a number n which added to its sum of digits gives 81043647654270.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29089075 + ... + 31753134.

It is an arithmetic number, because the mean of its divisors is an integer number (3473846822160).

Almost surely, 2^{81043647654270} is an apocalyptic number.

81043647654270 is an abundant number, since it is smaller than the sum of its proper divisors (141282548963970).

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

81043647654270 is a wasteful number, since it uses less digits than its factorization.

81043647654270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60848569.

The product of its (nonzero) digits is 27095040, while the sum is 57.

The spelling of 81043647654270 in words is "eighty-one trillion, forty-three billion, six hundred forty-seven million, six hundred fifty-four thousand, two hundred seventy".