81241507053 has 48 divisors (see below), whose sum is σ = 135889927680. Its totient is φ = 45809307648.

The previous prime is 81241507001. The next prime is 81241507079. The reversal of 81241507053 is 35070514218.

81241507053 is a `hidden beast` number, since 81 + 24 + 1 + 507 + 0 + 53 = 666.

It is not a de Polignac number, because 81241507053 - 2²² = 81237312749 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 81241506999 and 81241507017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81241507253) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11129901 + ... + 11137197.

It is an arithmetic number, because the mean of its divisors is an integer number (2831040160).

Almost surely, 2^81241507053 is an apocalyptic number.

It is an amenable number.

81241507053 is a deficient number, since it is larger than the sum of its proper divisors (54648420627).

81241507053 is a wasteful number, since it uses less digits than its factorization.

81241507053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9626 (or 9623 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The spelling of 81241507053 in words is "eighty-one billion, two hundred forty-one million, five hundred seven thousand, fifty-three".