71620731040 has 96 divisors (see below), whose sum is σ = 178227241920. Its totient is φ = 27122540544.

The previous prime is 71620731031. The next prime is 71620731041. The reversal of 71620731040 is 4013702617.

It is a super-2 number, since 2×71620731040² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 71620730993 and 71620731011.

It is not an unprimeable number, because it can be changed into a prime (71620731041) 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, 5151939 + ... + 5165821.

It is an arithmetic number, because the mean of its divisors is an integer number (1856533770).

Almost surely, 2^71620731040 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 71620731040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89113620960).

71620731040 is an abundant number, since it is smaller than the sum of its proper divisors (106606510880).

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

71620731040 is a wasteful number, since it uses less digits than its factorization.

71620731040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15614 (or 15606 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 31.

The spelling of 71620731040 in words is "seventy-one billion, six hundred twenty million, seven hundred thirty-one thousand, forty".