71057047590 has 96 divisors (see below), whose sum is σ = 196193443680. Its totient is φ = 17792345088.

The previous prime is 71057047553. The next prime is 71057047591. The reversal of 71057047590 is 9574075017.

71057047590 is a `hidden beast` number, since 7 + 1 + 0 + 57 + 0 + 4 + 7 + 590 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71057047591) 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, 9364 + ... + 377096.

It is an arithmetic number, because the mean of its divisors is an integer number (2043681705).

Almost surely, 2^71057047590 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71057047590, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98096721840).

71057047590 is an abundant number, since it is smaller than the sum of its proper divisors (125136396090).

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

71057047590 is a wasteful number, since it uses less digits than its factorization.

71057047590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367878 (or 367875 counting only the distinct ones).

The product of its (nonzero) digits is 308700, while the sum is 45.

The spelling of 71057047590 in words is "seventy-one billion, fifty-seven million, forty-seven thousand, five hundred ninety".