172112248644 has 96 divisors (see below), whose sum is σ = 465985873920. Its totient is φ = 48423336192.

The previous prime is 172112248621. The next prime is 172112248667. The reversal of 172112248644 is 446842211271.

It is an interprime number because it is at equal distance from previous prime (172112248621) and next prime (172112248667).

It is a super-2 number, since 2×172112248644² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 172112248596 and 172112248605.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27681024 + ... + 27687240.

It is an arithmetic number, because the mean of its divisors is an integer number (4854019520).

Almost surely, 2^172112248644 is an apocalyptic number.

172112248644 is a gapful number since it is divisible by the number (14) 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 172112248644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (232992936960).

172112248644 is an abundant number, since it is smaller than the sum of its proper divisors (293873625276).

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

172112248644 is a wasteful number, since it uses less digits than its factorization.

172112248644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11217 (or 11215 counting only the distinct ones).

The product of its digits is 172032, while the sum is 42.

The spelling of 172112248644 in words is "one hundred seventy-two billion, one hundred twelve million, two hundred forty-eight thousand, six hundred forty-four".