2478693879477 has 12 divisors (see below), whose sum is σ = 3580461131520. Its totient is φ = 1652404650408.

The previous prime is 2478693879433. The next prime is 2478693879481. The reversal of 2478693879477 is 7749783968742.

2478693879477 is a `hidden beast` number, since 2 + 4 + 7 + 8 + 69 + 3 + 87 + 9 + 477 = 666.

It is not a de Polignac number, because 2478693879477 - 2²⁸ = 2478425444021 is a prime.

It is a super-2 number, since 2×2478693879477² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2478693879396 and 2478693879405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2478693879377) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4556227 + ... + 5071152.

It is an arithmetic number, because the mean of its divisors is an integer number (298371760960).

Almost surely, 2^{2478693879477} is an apocalyptic number.

It is an amenable number.

2478693879477 is a deficient number, since it is larger than the sum of its proper divisors (1101767252043).

2478693879477 is a wasteful number, since it uses less digits than its factorization.

2478693879477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9655992 (or 9655989 counting only the distinct ones).

The product of its digits is 7169347584, while the sum is 81.

The spelling of 2478693879477 in words is "two trillion, four hundred seventy-eight billion, six hundred ninety-three million, eight hundred seventy-nine thousand, four hundred seventy-seven".