2478877656 has 24 divisors (see below), whose sum is σ = 6197803980. Its totient is φ = 826211248.

The previous prime is 2478877651. The next prime is 2478877691. The reversal of 2478877656 is 6567788742.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×2478877656² = 12289668866832108672, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2478877656.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2478877651) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 238831 + ... + 248993.

Almost surely, 2^2478877656 is an apocalyptic number.

It is an amenable number.

2478877656 is an abundant number, since it is smaller than the sum of its proper divisors (3718926324).

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

2478877656 is an frugal number, since it uses more digits than its factorization.

2478877656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20335 (or 10168 counting only the distinct ones).

The product of its digits is 31610880, while the sum is 60.

The square root of 2478877656 is about 49788.3285118109. The cubic root of 2478877656 is about 1353.3756684457.

The spelling of 2478877656 in words is "two billion, four hundred seventy-eight million, eight hundred seventy-seven thousand, six hundred fifty-six".