1551361563 has 12 divisors (see below), whose sum is σ = 2241198960. Its totient is φ = 1034082576.

The previous prime is 1551361547. The next prime is 1551361579. The reversal of 1551361563 is 3651631551.

1551361563 is a `hidden beast` number, since 1 + 551 + 36 + 15 + 63 = 666.

It is an interprime number because it is at equal distance from previous prime (1551361547) and next prime (1551361579).

It is not a de Polignac number, because 1551361563 - 2⁴ = 1551361547 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1551361543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 98733 + ... + 113361.

It is an arithmetic number, because the mean of its divisors is an integer number (186766580).

Almost surely, 2^1551361563 is an apocalyptic number.

1551361563 is a deficient number, since it is larger than the sum of its proper divisors (689837397).

1551361563 is a wasteful number, since it uses less digits than its factorization.

1551361563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26418 (or 26415 counting only the distinct ones).

The product of its digits is 40500, while the sum is 36.

The square root of 1551361563 is about 39387.3274417039. The cubic root of 1551361563 is about 1157.6332946275.

The spelling of 1551361563 in words is "one billion, five hundred fifty-one million, three hundred sixty-one thousand, five hundred sixty-three".