1661326415542 has 16 divisors (see below), whose sum is σ = 2524626316800. Its totient is φ = 819793414440.

The previous prime is 1661326415527. The next prime is 1661326415563. The reversal of 1661326415542 is 2455146231661.

It is a junction number, because it is equal to n+sod(n) for n = 1661326415492 and 1661326415501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1909792 + ... + 2640067.

It is an arithmetic number, because the mean of its divisors is an integer number (157789144800).

Almost surely, 2^{1661326415542} is an apocalyptic number.

1661326415542 is a deficient number, since it is larger than the sum of its proper divisors (863299901258).

1661326415542 is a wasteful number, since it uses less digits than its factorization.

1661326415542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4552251.

The product of its digits is 1036800, while the sum is 46.

The spelling of 1661326415542 in words is "one trillion, six hundred sixty-one billion, three hundred twenty-six million, four hundred fifteen thousand, five hundred forty-two".