71050778736 has 80 divisors (see below), whose sum is σ = 211176960000. Its totient is φ = 20163965184.

The previous prime is 71050778731. The next prime is 71050778779. The reversal of 71050778736 is 63787705017.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71050778731) 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, 659536 + ... + 759663.

It is an arithmetic number, because the mean of its divisors is an integer number (2639712000).

Almost surely, 2^71050778736 is an apocalyptic number.

It is an amenable number.

71050778736 is an abundant number, since it is smaller than the sum of its proper divisors (140126181264).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71050778736 is a wasteful number, since it uses less digits than its factorization.

71050778736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1419366 (or 1419360 counting only the distinct ones).

The product of its (nonzero) digits is 1728720, while the sum is 51.

The spelling of 71050778736 in words is "seventy-one billion, fifty million, seven hundred seventy-eight thousand, seven hundred thirty-six".