71023061620 has 96 divisors (see below), whose sum is σ = 171400110336. Its totient is φ = 24216192000.

The previous prime is 71023061563. The next prime is 71023061633. The reversal of 71023061620 is 2616032017.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21513970 + ... + 21517270.

It is an arithmetic number, because the mean of its divisors is an integer number (1785417816).

Almost surely, 2^71023061620 is an apocalyptic number.

71023061620 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71023061620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85700055168).

71023061620 is an abundant number, since it is smaller than the sum of its proper divisors (100377048716).

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

71023061620 is a wasteful number, since it uses less digits than its factorization.

71023061620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4121 (or 4119 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 28.

Adding to 71023061620 its reverse (2616032017), we get a palindrome (73639093637).

The spelling of 71023061620 in words is "seventy-one billion, twenty-three million, sixty-one thousand, six hundred twenty".