1561630513155 has 8 divisors (see below), whose sum is σ = 2498608821072. Its totient is φ = 832869607008.

The previous prime is 1561630513147. The next prime is 1561630513171. The reversal of 1561630513155 is 5513150361651.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1561630513155 - 2³ = 1561630513147 is a prime.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 52054350424 + ... + 52054350453.

It is an arithmetic number, because the mean of its divisors is an integer number (312326102634).

Almost surely, 2^{1561630513155} is an apocalyptic number.

1561630513155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1561630513155 is a deficient number, since it is larger than the sum of its proper divisors (936978307917).

1561630513155 is a wasteful number, since it uses less digits than its factorization.

1561630513155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104108700885.

The product of its (nonzero) digits is 202500, while the sum is 42.

The spelling of 1561630513155 in words is "one trillion, five hundred sixty-one billion, six hundred thirty million, five hundred thirteen thousand, one hundred fifty-five".