81301037655 has 8 divisors (see below), whose sum is σ = 130081660272. Its totient is φ = 43360553408.

The previous prime is 81301037633. The next prime is 81301037663. The reversal of 81301037655 is 55673010318.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 81301037655 - 2⁶ = 81301037591 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2710034574 + ... + 2710034603.

It is an arithmetic number, because the mean of its divisors is an integer number (16260207534).

Almost surely, 2^81301037655 is an apocalyptic number.

81301037655 is a deficient number, since it is larger than the sum of its proper divisors (48780622617).

81301037655 is a wasteful number, since it uses less digits than its factorization.

81301037655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5420069185.

The product of its (nonzero) digits is 75600, while the sum is 39.

The spelling of 81301037655 in words is "eighty-one billion, three hundred one million, thirty-seven thousand, six hundred fifty-five".