81960903941 has 12 divisors (see below), whose sum is σ = 95469272640. Its totient is φ = 70158627000.

The previous prime is 81960903923. The next prime is 81960903967. The reversal of 81960903941 is 14930906918.

It is a de Polignac number, because none of the positive numbers 2^k-81960903941 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 81960903941.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81960900941) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1076831 + ... + 1150428.

It is an arithmetic number, because the mean of its divisors is an integer number (7955772720).

Almost surely, 2^81960903941 is an apocalyptic number.

It is an amenable number.

81960903941 is a deficient number, since it is larger than the sum of its proper divisors (13508368699).

81960903941 is a wasteful number, since it uses less digits than its factorization.

81960903941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2228024 (or 2228017 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 50.

The spelling of 81960903941 in words is "eighty-one billion, nine hundred sixty million, nine hundred three thousand, nine hundred forty-one".