2478819919779 has 240 divisors, whose sum is σ = 4498104219840. Its totient is φ = 1331487590400.

The previous prime is 2478819919729. The next prime is 2478819919813. The reversal of 2478819919779 is 9779199188742.

It is not a de Polignac number, because 2478819919779 - 2³² = 2474524952483 is a prime.

It is a super-2 number, since 2×2478819919779² (a number of 26 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (81).

Its product of digits (1152216576) is a multiple of the sum of its prime divisors (784).

It is a junction number, because it is equal to n+sod(n) for n = 2478819919698 and 2478819919707.

It is not an unprimeable number, because it can be changed into a prime (2478819919729) by changing a digit.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 4124492079 + ... + 4124492679.

It is an arithmetic number, because the mean of its divisors is an integer number (18742100916).

Almost surely, 2^{2478819919779} is an apocalyptic number.

2478819919779 is a deficient number, since it is larger than the sum of its proper divisors (2019284300061).

2478819919779 is an equidigital number, since it uses as much as digits as its factorization.

2478819919779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840 (or 784 counting only the distinct ones).

The product of its digits is 1152216576, while the sum is 81.

The spelling of 2478819919779 in words is "two trillion, four hundred seventy-eight billion, eight hundred nineteen million, nine hundred nineteen thousand, seven hundred seventy-nine".