5561123451 has 16 divisors (see below), whose sum is σ = 7987768320. Its totient is φ = 3421130400.

The previous prime is 5561123443. The next prime is 5561123467. The reversal of 5561123451 is 1543211655.

It is not a de Polignac number, because 5561123451 - 2³ = 5561123443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5561123431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109776 + ... + 152226.

It is an arithmetic number, because the mean of its divisors is an integer number (499235520).

Almost surely, 2^5561123451 is an apocalyptic number.

5561123451 is a deficient number, since it is larger than the sum of its proper divisors (2426644869).

5561123451 is a wasteful number, since it uses less digits than its factorization.

5561123451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45826.

The product of its digits is 18000, while the sum is 33.

The square root of 5561123451 is about 74572.9404744107. The cubic root of 5561123451 is about 1771.6890949312.

The spelling of 5561123451 in words is "five billion, five hundred sixty-one million, one hundred twenty-three thousand, four hundred fifty-one".