1516400553 has 4 divisors (see below), whose sum is σ = 2021867408. Its totient is φ = 1010933700.

The previous prime is 1516400551. The next prime is 1516400579. The reversal of 1516400553 is 3550046151.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1516400553 - 2¹ = 1516400551 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1516400553.

It is not an unprimeable number, because it can be changed into a prime (1516400551) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 252733423 + ... + 252733428.

It is an arithmetic number, because the mean of its divisors is an integer number (505466852).

Almost surely, 2^1516400553 is an apocalyptic number.

It is an amenable number.

1516400553 is a deficient number, since it is larger than the sum of its proper divisors (505466855).

1516400553 is an equidigital number, since it uses as much as digits as its factorization.

1516400553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505466854.

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 1516400553 is about 38940.9880845363. The cubic root of 1516400553 is about 1148.8711172882.

The spelling of 1516400553 in words is "one billion, five hundred sixteen million, four hundred thousand, five hundred fifty-three".