1561506153 has 16 divisors (see below), whose sum is σ = 2142313536. Its totient is φ = 1010957760.

The previous prime is 1561506139. The next prime is 1561506161. The reversal of 1561506153 is 3516051651.

It is not a de Polignac number, because 1561506153 - 2¹⁰ = 1561505129 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1561506103) 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, 47050 + ... + 73052.

It is an arithmetic number, because the mean of its divisors is an integer number (133894596).

Almost surely, 2^1561506153 is an apocalyptic number.

It is an amenable number.

1561506153 is a deficient number, since it is larger than the sum of its proper divisors (580807383).

1561506153 is a wasteful number, since it uses less digits than its factorization.

1561506153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26584.

The product of its (nonzero) digits is 13500, while the sum is 33.

The square root of 1561506153 is about 39515.8974717771. The cubic root of 1561506153 is about 1160.1511280010.

The spelling of 1561506153 in words is "one billion, five hundred sixty-one million, five hundred six thousand, one hundred fifty-three".