1561362179798 has 8 divisors (see below), whose sum is σ = 2344186039008. Its totient is φ = 779966833464.

The previous prime is 1561362179791. The next prime is 1561362179801. The reversal of 1561362179798 is 8979712631651.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1561362179791) 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 3 ways as a sum of consecutive naturals, for example, 357125486 + ... + 357129857.

It is an arithmetic number, because the mean of its divisors is an integer number (293023254876).

Almost surely, 2^{1561362179798} is an apocalyptic number.

1561362179798 is a deficient number, since it is larger than the sum of its proper divisors (782823859210).

1561362179798 is a wasteful number, since it uses less digits than its factorization.

1561362179798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 714256438.

The product of its digits is 34292160, while the sum is 65.

The spelling of 1561362179798 in words is "one trillion, five hundred sixty-one billion, three hundred sixty-two million, one hundred seventy-nine thousand, seven hundred ninety-eight".