2278519946640 has 480 divisors, whose sum is σ = 9114986889216. Its totient is φ = 499107640320.

The previous prime is 2278519946597. The next prime is 2278519946641. The reversal of 2278519946640 is 466499158722.

2278519946640 is a `hidden beast` number, since 2 + 2 + 7 + 85 + 1 + 99 + 466 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (2278519946641) 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, 16021927 + ... + 16163513.

Almost surely, 2^{2278519946640} is an apocalyptic number.

2278519946640 is a gapful number since it is divisible by the number (20) 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 2278519946640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4557493444608).

2278519946640 is an abundant number, since it is smaller than the sum of its proper divisors (6836466942576).

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

2278519946640 is a wasteful number, since it uses less digits than its factorization.

2278519946640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141747 (or 141738 counting only the distinct ones).

The product of its (nonzero) digits is 52254720, while the sum is 63.

The spelling of 2278519946640 in words is "two trillion, two hundred seventy-eight billion, five hundred nineteen million, nine hundred forty-six thousand, six hundred forty".