81048735 has 16 divisors (see below), whose sum is σ = 144086880. Its totient is φ = 43225920.

The previous prime is 81048731. The next prime is 81048739. The reversal of 81048735 is 53784018.

It is an interprime number because it is at equal distance from previous prime (81048731) and next prime (81048739).

It is not a de Polignac number, because 81048735 - 2² = 81048731 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 81048735.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81048731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 300046 + ... + 300315.

It is an arithmetic number, because the mean of its divisors is an integer number (9005430).

Almost surely, 2^81048735 is an apocalyptic number.

81048735 is a deficient number, since it is larger than the sum of its proper divisors (63038145).

81048735 is a wasteful number, since it uses less digits than its factorization.

81048735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600375 (or 600369 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 81048735 is about 9002.7070928693. The cubic root of 81048735 is about 432.7616290439.

The spelling of 81048735 in words is "eighty-one million, forty-eight thousand, seven hundred thirty-five".