81085273370454 has 64 divisors (see below), whose sum is σ = 176807346912000. Its totient is φ = 24692800567680.

The previous prime is 81085273370447. The next prime is 81085273370467. The reversal of 81085273370454 is 45407337258018.

It is a happy number.

It is a super-2 number, since 2×81085273370454² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a junction number, because it is equal to n+sod(n) for n = 81085273370394 and 81085273370403.

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, 12222864 + ... + 17651315.

It is an arithmetic number, because the mean of its divisors is an integer number (2762614795500).

Almost surely, 2^{81085273370454} is an apocalyptic number.

81085273370454 is an abundant number, since it is smaller than the sum of its proper divisors (95722073541546).

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

81085273370454 is a wasteful number, since it uses less digits than its factorization.

81085273370454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29875053.

The product of its (nonzero) digits is 22579200, while the sum is 57.

The spelling of 81085273370454 in words is "eighty-one trillion, eighty-five billion, two hundred seventy-three million, three hundred seventy thousand, four hundred fifty-four".