81370037341 has 4 divisors (see below), whose sum is σ = 81591754432. Its totient is φ = 81148320252.

The previous prime is 81370037321. The next prime is 81370037347. The reversal of 81370037341 is 14373007318.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 81370037341 - 2¹⁷ = 81369906269 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 81370037341.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81370037347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110857995 + ... + 110858728.

It is an arithmetic number, because the mean of its divisors is an integer number (20397938608).

Almost surely, 2^81370037341 is an apocalyptic number.

It is an amenable number.

81370037341 is a deficient number, since it is larger than the sum of its proper divisors (221717091).

81370037341 is a wasteful number, since it uses less digits than its factorization.

81370037341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221717090.

The product of its (nonzero) digits is 42336, while the sum is 37.

The spelling of 81370037341 in words is "eighty-one billion, three hundred seventy million, thirty-seven thousand, three hundred forty-one".