2478811551 has 4 divisors (see below), whose sum is σ = 3305082072. Its totient is φ = 1652541032.

The previous prime is 2478811549. The next prime is 2478811567. The reversal of 2478811551 is 1551188742.

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

It is a cyclic number.

It is not a de Polignac number, because 2478811551 - 2¹ = 2478811549 is a prime.

It is a super-2 number, since 2×2478811551² = 12289013410742051202, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2478811501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 413135256 + ... + 413135261.

It is an arithmetic number, because the mean of its divisors is an integer number (826270518).

Almost surely, 2^2478811551 is an apocalyptic number.

2478811551 is a deficient number, since it is larger than the sum of its proper divisors (826270521).

2478811551 is an equidigital number, since it uses as much as digits as its factorization.

2478811551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 826270520.

The product of its digits is 89600, while the sum is 42.

The square root of 2478811551 is about 49787.6646469786. The cubic root of 2478811551 is about 1353.3636380424.

The spelling of 2478811551 in words is "two billion, four hundred seventy-eight million, eight hundred eleven thousand, five hundred fifty-one".