81960441 has 8 divisors (see below), whose sum is σ = 110407584. Its totient is φ = 54076800.

The previous prime is 81960421. The next prime is 81960449. The reversal of 81960441 is 14406918.

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

It is not a de Polignac number, because 81960441 - 2⁹ = 81959929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81960449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140535 + ... + 141116.

It is an arithmetic number, because the mean of its divisors is an integer number (13800948).

Almost surely, 2^81960441 is an apocalyptic number.

It is an amenable number.

81960441 is a deficient number, since it is larger than the sum of its proper divisors (28447143).

81960441 is a wasteful number, since it uses less digits than its factorization.

81960441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281751.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 81960441 is about 9053.2005942650. The cubic root of 81960441 is about 434.3782741916.

The spelling of 81960441 in words is "eighty-one million, nine hundred sixty thousand, four hundred forty-one".