81953519548 has 12 divisors (see below), whose sum is σ = 143495325792. Its totient is φ = 40954855040.

The previous prime is 81953519537. The next prime is 81953519579. The reversal of 81953519548 is 84591535918.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 81953519492 and 81953519501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5467765 + ... + 5482732.

It is an arithmetic number, because the mean of its divisors is an integer number (11957943816).

Almost surely, 2^81953519548 is an apocalyptic number.

It is an amenable number.

81953519548 is a deficient number, since it is larger than the sum of its proper divisors (61541806244).

81953519548 is a wasteful number, since it uses less digits than its factorization.

81953519548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10952372 (or 10952370 counting only the distinct ones).

The product of its digits is 7776000, while the sum is 58.

The spelling of 81953519548 in words is "eighty-one billion, nine hundred fifty-three million, five hundred nineteen thousand, five hundred forty-eight".