71550857457 has 48 divisors (see below), whose sum is σ = 110024678400. Its totient is φ = 44678913120.

The previous prime is 71550857401. The next prime is 71550857461. The reversal of 71550857457 is 75475805517.

71550857457 is a `hidden beast` number, since 7 + 1 + 550 + 85 + 7 + 4 + 5 + 7 = 666.

It is not a de Polignac number, because 71550857457 - 2¹⁸ = 71550595313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71550857857) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12167644 + ... + 12173522.

It is an arithmetic number, because the mean of its divisors is an integer number (2292180800).

Almost surely, 2^71550857457 is an apocalyptic number.

It is an amenable number.

71550857457 is a deficient number, since it is larger than the sum of its proper divisors (38473820943).

71550857457 is a wasteful number, since it uses less digits than its factorization.

71550857457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6698 (or 6695 counting only the distinct ones).

The product of its (nonzero) digits is 6860000, while the sum is 54.

The spelling of 71550857457 in words is "seventy-one billion, five hundred fifty million, eight hundred fifty-seven thousand, four hundred fifty-seven".