81048401010745 has 64 divisors (see below), whose sum is σ = 117106090536960. Its totient is φ = 52604258976000.

The previous prime is 81048401010743. The next prime is 81048401010781. The reversal of 81048401010745 is 54701010484018.

It is not a de Polignac number, because 81048401010745 - 2¹ = 81048401010743 is a prime.

It is a super-2 number, since 2×81048401010745² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (81048401010743) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7609458670 + ... + 7609469320.

It is an arithmetic number, because the mean of its divisors is an integer number (1829782664640).

Almost surely, 2^{81048401010745} is an apocalyptic number.

It is an amenable number.

81048401010745 is a deficient number, since it is larger than the sum of its proper divisors (36057689526215).

81048401010745 is a wasteful number, since it uses less digits than its factorization.

81048401010745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19766.

The product of its (nonzero) digits is 143360, while the sum is 43.

The spelling of 81048401010745 in words is "eighty-one trillion, forty-eight billion, four hundred one million, ten thousand, seven hundred forty-five".