1561424450 has 24 divisors (see below), whose sum is σ = 2911219920. Its totient is φ = 623070800.

The previous prime is 1561424407. The next prime is 1561424453. The reversal of 1561424450 is 544241651.

It is not an unprimeable number, because it can be changed into a prime (1561424453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16316 + ... + 58215.

It is an arithmetic number, because the mean of its divisors is an integer number (121300830).

Almost surely, 2^1561424450 is an apocalyptic number.

1561424450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1561424450 is a deficient number, since it is larger than the sum of its proper divisors (1349795470).

1561424450 is a wasteful number, since it uses less digits than its factorization.

1561424450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74962 (or 74957 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 32.

The square root of 1561424450 is about 39514.8636591346. The cubic root of 1561424450 is about 1160.1308933746.

The spelling of 1561424450 in words is "one billion, five hundred sixty-one million, four hundred twenty-four thousand, four hundred fifty".