71172423660 has 192 divisors, whose sum is σ = 218757901824. Its totient is φ = 17183232000.

The previous prime is 71172423653. The next prime is 71172423661. The reversal of 71172423660 is 6632427117.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (71172423661) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12591835 + ... + 12597485.

It is an arithmetic number, because the mean of its divisors is an integer number (1139364072).

Almost surely, 2^71172423660 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 71172423660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109378950912).

71172423660 is an abundant number, since it is smaller than the sum of its proper divisors (147585478164).

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

71172423660 is a wasteful number, since it uses less digits than its factorization.

71172423660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5984 (or 5982 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 39.

The spelling of 71172423660 in words is "seventy-one billion, one hundred seventy-two million, four hundred twenty-three thousand, six hundred sixty".