81547462760401 has 32 divisors (see below), whose sum is σ = 89893780704000. Its totient is φ = 73361938464000.

The previous prime is 81547462760341. The next prime is 81547462760447. The reversal of 81547462760401 is 10406726474518.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 81547462760401 - 2⁷ = 81547462760273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81547462760461) 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, 273260611 + ... + 273558871.

It is an arithmetic number, because the mean of its divisors is an integer number (2809180647000).

Almost surely, 2^{81547462760401} is an apocalyptic number.

It is an amenable number.

81547462760401 is a deficient number, since it is larger than the sum of its proper divisors (8346317943599).

81547462760401 is a wasteful number, since it uses less digits than its factorization.

81547462760401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299161.

The product of its (nonzero) digits is 9031680, while the sum is 55.

The spelling of 81547462760401 in words is "eighty-one trillion, five hundred forty-seven billion, four hundred sixty-two million, seven hundred sixty thousand, four hundred one".