71406753640 has 64 divisors (see below), whose sum is σ = 163501934400. Its totient is φ = 28059067392.

The previous prime is 71406753623. The next prime is 71406753653. The reversal of 71406753640 is 4635760417.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3655339 + ... + 3674821.

It is an arithmetic number, because the mean of its divisors is an integer number (2554717725).

Almost surely, 2^71406753640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71406753640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81750967200).

71406753640 is an abundant number, since it is smaller than the sum of its proper divisors (92095180760).

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

71406753640 is a wasteful number, since it uses less digits than its factorization.

71406753640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21106 (or 21102 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 43.

The spelling of 71406753640 in words is "seventy-one billion, four hundred six million, seven hundred fifty-three thousand, six hundred forty".