1661392346836 has 24 divisors (see below), whose sum is σ = 2962361009664. Its totient is φ = 815004197280.

The previous prime is 1661392346827. The next prime is 1661392346879. The reversal of 1661392346836 is 6386432931661.

It is a happy number.

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, 17383621 + ... + 17478931.

It is an arithmetic number, because the mean of its divisors is an integer number (123431708736).

Almost surely, 2^{1661392346836} is an apocalyptic number.

It is an amenable number.

1661392346836 is a deficient number, since it is larger than the sum of its proper divisors (1300968662828).

1661392346836 is a wasteful number, since it uses less digits than its factorization.

1661392346836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177591 (or 177589 counting only the distinct ones).

The product of its digits is 20155392, while the sum is 58.

The spelling of 1661392346836 in words is "one trillion, six hundred sixty-one billion, three hundred ninety-two million, three hundred forty-six thousand, eight hundred thirty-six".