8172478582450 has 96 divisors (see below), whose sum is σ = 18918900362880. Its totient is φ = 2557393344000.

The previous prime is 8172478582447. The next prime is 8172478582453. The reversal of 8172478582450 is 542858742718.

It is an interprime number because it is at equal distance from previous prime (8172478582447) and next prime (8172478582453).

It is a super-2 number, since 2×8172478582450² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8172478582453) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9685776 + ... + 10495675.

It is an arithmetic number, because the mean of its divisors is an integer number (197071878780).

Almost surely, 2^{8172478582450} is an apocalyptic number.

8172478582450 is an abundant number, since it is smaller than the sum of its proper divisors (10746421780430).

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

8172478582450 is a wasteful number, since it uses less digits than its factorization.

8172478582450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20181572 (or 20181567 counting only the distinct ones).

The product of its (nonzero) digits is 40140800, while the sum is 61.

The spelling of 8172478582450 in words is "eight trillion, one hundred seventy-two billion, four hundred seventy-eight million, five hundred eighty-two thousand, four hundred fifty".