3923148721636 has 27 divisors (see below), whose sum is σ = 6882933910377. Its totient is φ = 1956608760960.

The previous prime is 3923148721603. The next prime is 3923148721651. The reversal of 3923148721636 is 6361278413293.

It is a happy number.

The square root of 3923148721636 is 1980694.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 3318262992100 + 604885729536 = 1821610^2 + 777744^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1945040500 + ... + 1945042516.

Almost surely, 2^{3923148721636} is an apocalyptic number.

3923148721636 is the 1980694-th square number.

It is an amenable number.

3923148721636 is a deficient number, since it is larger than the sum of its proper divisors (2959785188741).

3923148721636 is an frugal number, since it uses more digits than its factorization.

3923148721636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5020 (or 2510 counting only the distinct ones).

The product of its digits is 7838208, while the sum is 55.

The spelling of 3923148721636 in words is "three trillion, nine hundred twenty-three billion, one hundred forty-eight million, seven hundred twenty-one thousand, six hundred thirty-six".