81485951301 has 36 divisors (see below), whose sum is σ = 131613601600. Its totient is φ = 48437440128.

The previous prime is 81485951291. The next prime is 81485951303. The reversal of 81485951301 is 10315958418.

81485951301 is a `hidden beast` number, since 8 + 1 + 48 + 595 + 13 + 0 + 1 = 666.

It is not a de Polignac number, because 81485951301 - 2⁹ = 81485950789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81485951303) 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 35 ways as a sum of consecutive naturals, for example, 775021 + ... + 873858.

Almost surely, 2^81485951301 is an apocalyptic number.

It is an amenable number.

81485951301 is a deficient number, since it is larger than the sum of its proper divisors (50127650299).

81485951301 is a wasteful number, since it uses less digits than its factorization.

81485951301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1648938 (or 1648918 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 45.

The spelling of 81485951301 in words is "eighty-one billion, four hundred eighty-five million, nine hundred fifty-one thousand, three hundred one".