81400480348 has 24 divisors (see below), whose sum is σ = 155411489520. Its totient is φ = 36997701120.

The previous prime is 81400480339. The next prime is 81400480349. The reversal of 81400480348 is 84308400418.

It is a super-2 number, since 2×81400480348² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 81400480348.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81400480349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 693258 + ... + 802126.

It is an arithmetic number, because the mean of its divisors is an integer number (6475478730).

Almost surely, 2^81400480348 is an apocalyptic number.

It is an amenable number.

81400480348 is a deficient number, since it is larger than the sum of its proper divisors (74011009172).

81400480348 is a wasteful number, since it uses less digits than its factorization.

81400480348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125877 (or 125875 counting only the distinct ones).

The product of its (nonzero) digits is 98304, while the sum is 40.

The spelling of 81400480348 in words is "eighty-one billion, four hundred million, four hundred eighty thousand, three hundred forty-eight".