81996035224 has 16 divisors (see below), whose sum is σ = 153835374600. Its totient is φ = 40973268672.

The previous prime is 81996035167. The next prime is 81996035249. The reversal of 81996035224 is 42253069918.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3079534 + ... + 3106045.

Almost surely, 2^81996035224 is an apocalyptic number.

It is an amenable number.

81996035224 is a deficient number, since it is larger than the sum of its proper divisors (71839339376).

81996035224 is a wasteful number, since it uses less digits than its factorization.

81996035224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6187242 (or 6187238 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 49.

The spelling of 81996035224 in words is "eighty-one billion, nine hundred ninety-six million, thirty-five thousand, two hundred twenty-four".