71903421953 has 16 divisors (see below), whose sum is σ = 79998408000. Its totient is φ = 64074511680.

The previous prime is 71903421949. The next prime is 71903422039. The reversal of 71903421953 is 35912430917.

It is a cyclic number.

It is not a de Polignac number, because 71903421953 - 2² = 71903421949 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (71903421853) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67775 + ... + 385227.

It is an arithmetic number, because the mean of its divisors is an integer number (4999900500).

Almost surely, 2^71903421953 is an apocalyptic number.

It is an amenable number.

71903421953 is a deficient number, since it is larger than the sum of its proper divisors (8094986047).

71903421953 is a wasteful number, since it uses less digits than its factorization.

71903421953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317872.

The product of its (nonzero) digits is 204120, while the sum is 44.

The spelling of 71903421953 in words is "seventy-one billion, nine hundred three million, four hundred twenty-one thousand, nine hundred fifty-three".