81045265048 has 64 divisors (see below), whose sum is σ = 178947014400. Its totient is φ = 34021975680.

The previous prime is 81045265039. The next prime is 81045265057. The reversal of 81045265048 is 84056254018.

It is an interprime number because it is at equal distance from previous prime (81045265039) and next prime (81045265057).

It is a junction number, because it is equal to n+sod(n) for n = 81045264995 and 81045265013.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 631686 + ... + 749077.

It is an arithmetic number, because the mean of its divisors is an integer number (2796047100).

Almost surely, 2^81045265048 is an apocalyptic number.

81045265048 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

81045265048 is an abundant number, since it is smaller than the sum of its proper divisors (97901749352).

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

81045265048 is a wasteful number, since it uses less digits than its factorization.

81045265048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1380832 (or 1380828 counting only the distinct ones).

The product of its (nonzero) digits is 307200, while the sum is 43.

The spelling of 81045265048 in words is "eighty-one billion, forty-five million, two hundred sixty-five thousand, forty-eight".