2451561555 has 32 divisors (see below), whose sum is σ = 4011621696. Its totient is φ = 1278111744.

The previous prime is 2451561547. The next prime is 2451561571. The reversal of 2451561555 is 5551651542.

It is not a de Polignac number, because 2451561555 - 2³ = 2451561547 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 113829 + ... + 133641.

It is an arithmetic number, because the mean of its divisors is an integer number (125363178).

Almost surely, 2^2451561555 is an apocalyptic number.

2451561555 is a deficient number, since it is larger than the sum of its proper divisors (1560060141).

2451561555 is a wasteful number, since it uses less digits than its factorization.

2451561555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20007.

The product of its digits is 150000, while the sum is 39.

The square root of 2451561555 is about 49513.2462579460. The cubic root of 2451561555 is about 1348.3861015633.

The spelling of 2451561555 in words is "two billion, four hundred fifty-one million, five hundred sixty-one thousand, five hundred fifty-five".