1561230950459 has 8 divisors (see below), whose sum is σ = 1594605270528. Its totient is φ = 1527863157160.

The previous prime is 1561230950423. The next prime is 1561230950509. The reversal of 1561230950459 is 9540590321651.

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

It is a cyclic number.

It is not a de Polignac number, because 1561230950459 - 2²⁰ = 1561229901883 is a prime.

It is a super-2 number, since 2×1561230950459² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1561230950659) 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 7 ways as a sum of consecutive naturals, for example, 1146647 + ... + 2106480.

It is an arithmetic number, because the mean of its divisors is an integer number (199325658816).

Almost surely, 2^{1561230950459} is an apocalyptic number.

1561230950459 is a deficient number, since it is larger than the sum of its proper divisors (33374320069).

1561230950459 is a wasteful number, since it uses less digits than its factorization.

1561230950459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3263385.

The product of its (nonzero) digits is 1458000, while the sum is 50.

The spelling of 1561230950459 in words is "one trillion, five hundred sixty-one billion, two hundred thirty million, nine hundred fifty thousand, four hundred fifty-nine".