81413806248 has 48 divisors (see below), whose sum is σ = 220665201120. Its totient is φ = 27117076896.

The previous prime is 81413806237. The next prime is 81413806267. The reversal of 81413806248 is 84260831418.

81413806248 is a `hidden beast` number, since 8 + 1 + 4 + 13 + 8 + 0 + 624 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 340086 + ... + 527717.

It is an arithmetic number, because the mean of its divisors is an integer number (4597191690).

Almost surely, 2^81413806248 is an apocalyptic number.

It is an amenable number.

81413806248 is an abundant number, since it is smaller than the sum of its proper divisors (139251394872).

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

81413806248 is a wasteful number, since it uses less digits than its factorization.

81413806248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869118 (or 869111 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 45.

The spelling of 81413806248 in words is "eighty-one billion, four hundred thirteen million, eight hundred six thousand, two hundred forty-eight".