1551561156675 has 48 divisors (see below), whose sum is σ = 2974200353280. Its totient is φ = 791521045920.

The previous prime is 1551561156637. The next prime is 1551561156689. The reversal of 1551561156675 is 5766511651551.

1551561156675 is a `hidden beast` number, since 1 + 5 + 5 + 1 + 5 + 6 + 1 + 1 + 566 + 75 = 666.

It is not a de Polignac number, because 1551561156675 - 2⁶ = 1551561156611 is a prime.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 49954239 + ... + 49985288.

It is an arithmetic number, because the mean of its divisors is an integer number (61962507360).

Almost surely, 2^{1551561156675} is an apocalyptic number.

1551561156675 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1551561156675 is a deficient number, since it is larger than the sum of its proper divisors (1422639196605).

1551561156675 is a wasteful number, since it uses less digits than its factorization.

1551561156675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99939569 (or 99939558 counting only the distinct ones).

The product of its digits is 4725000, while the sum is 54.

The spelling of 1551561156675 in words is "one trillion, five hundred fifty-one billion, five hundred sixty-one million, one hundred fifty-six thousand, six hundred seventy-five".