81472540472741 has 32 divisors (see below), whose sum is σ = 89707675913856. Its totient is φ = 73378867968000.

The previous prime is 81472540472723. The next prime is 81472540472749. The reversal of 81472540472741 is 14727404527418.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 81472540472741 - 2¹⁴ = 81472540456357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81472540472749) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2248058381 + ... + 2248094621.

It is an arithmetic number, because the mean of its divisors is an integer number (2803364872308).

Almost surely, 2^{81472540472741} is an apocalyptic number.

It is an amenable number.

81472540472741 is a deficient number, since it is larger than the sum of its proper divisors (8235135441115).

81472540472741 is a wasteful number, since it uses less digits than its factorization.

81472540472741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40853.

The product of its (nonzero) digits is 14049280, while the sum is 56.

The spelling of 81472540472741 in words is "eighty-one trillion, four hundred seventy-two billion, five hundred forty million, four hundred seventy-two thousand, seven hundred forty-one".