2475747978 has 192 divisors, whose sum is σ = 6111313920. Its totient is φ = 661939200.

The previous prime is 2475747973. The next prime is 2475747979. The reversal of 2475747978 is 8797475742.

It is a super-2 number, since 2×2475747978² = 12258656101142176968, which contains 22 as substring.

Its product of digits (27659520) is a multiple of the sum of its prime divisors (196).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2475747973) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 31338543 + ... + 31338621.

It is an arithmetic number, because the mean of its divisors is an integer number (31829760).

Almost surely, 2^2475747978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2475747978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3055656960).

2475747978 is an abundant number, since it is smaller than the sum of its proper divisors (3635565942).

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

2475747978 is a wasteful number, since it uses less digits than its factorization.

2475747978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213 (or 196 counting only the distinct ones).

The product of its digits is 27659520, while the sum is 60.

The square root of 2475747978 is about 49756.8887491973. Note that the first 3 decimals coincide. The cubic root of 2475747978 is about 1352.8058657039.

It can be divided in two parts, 247574 and 7978, that added together give a palindrome (255552).

The spelling of 2475747978 in words is "two billion, four hundred seventy-five million, seven hundred forty-seven thousand, nine hundred seventy-eight".