80960449781 has 4 divisors (see below), whose sum is σ = 81542899200. Its totient is φ = 80378000364.

The previous prime is 80960449753. The next prime is 80960449789. The reversal of 80960449781 is 18794406908.

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 80960449781 - 2²² = 80956255477 is a prime.

It is a super-2 number, since 2×80960449781² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80960449789) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 291224501 + ... + 291224778.

It is an arithmetic number, because the mean of its divisors is an integer number (20385724800).

Almost surely, 2^80960449781 is an apocalyptic number.

It is an amenable number.

80960449781 is a deficient number, since it is larger than the sum of its proper divisors (582449419).

80960449781 is a wasteful number, since it uses less digits than its factorization.

80960449781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582449418.

The product of its (nonzero) digits is 3483648, while the sum is 56.

The spelling of 80960449781 in words is "eighty billion, nine hundred sixty million, four hundred forty-nine thousand, seven hundred eighty-one".