71620071620 has 48 divisors (see below), whose sum is σ = 151949041776. Its totient is φ = 28353600000.

The previous prime is 71620071619. The next prime is 71620071629. The reversal of 71620071620 is 2617002617.

It can be written as a sum of positive squares in 8 ways, for example, as 32485736644 + 39134334976 = 180238^2 + 197824^2 .

It is not an unprimeable number, because it can be changed into a prime (71620071629) 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, 7228670 + ... + 7238570.

It is an arithmetic number, because the mean of its divisors is an integer number (3165605037).

Almost surely, 2^71620071620 is an apocalyptic number.

It is an amenable number.

71620071620 is an abundant number, since it is smaller than the sum of its proper divisors (80328970156).

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

71620071620 is a wasteful number, since it uses less digits than its factorization.

71620071620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13592 (or 13590 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 32.

The spelling of 71620071620 in words is "seventy-one billion, six hundred twenty million, seventy-one thousand, six hundred twenty".