2520417478 has 4 divisors (see below), whose sum is σ = 3780626220. Its totient is φ = 1260208738.

The previous prime is 2520417461. The next prime is 2520417481. The reversal of 2520417478 is 8747140252.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 2520417478.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 630104368 + ... + 630104371.

It is an arithmetic number, because the mean of its divisors is an integer number (945156555).

Almost surely, 2^2520417478 is an apocalyptic number.

2520417478 is a deficient number, since it is larger than the sum of its proper divisors (1260208742).

2520417478 is a wasteful number, since it uses less digits than its factorization.

2520417478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1260208741.

The product of its (nonzero) digits is 125440, while the sum is 40.

The square root of 2520417478 is about 50203.7596002530. The cubic root of 2520417478 is about 1360.8935660987.

The spelling of 2520417478 in words is "two billion, five hundred twenty million, four hundred seventeen thousand, four hundred seventy-eight".