47898219978 has 96 divisors (see below), whose sum is σ = 120306700800. Its totient is φ = 13489452288.

The previous prime is 47898219973. The next prime is 47898219979. The reversal of 47898219978 is 87991289874.

47898219978 is a `hidden beast` number, since 478 + 9 + 82 + 1 + 9 + 9 + 78 = 666.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (47898219973) 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, 6496278 + ... + 6503646.

It is an arithmetic number, because the mean of its divisors is an integer number (1253194800).

Almost surely, 2^47898219978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 47898219978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60153350400).

47898219978 is an abundant number, since it is smaller than the sum of its proper divisors (72408480822).

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

47898219978 is a wasteful number, since it uses less digits than its factorization.

47898219978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8116 (or 8113 counting only the distinct ones).

The product of its digits is 146313216, while the sum is 72.

The spelling of 47898219978 in words is "forty-seven billion, eight hundred ninety-eight million, two hundred nineteen thousand, nine hundred seventy-eight".