1972145816 has 8 divisors (see below), whose sum is σ = 3697773420. Its totient is φ = 986072904.

The previous prime is 1972145743. The next prime is 1972145827. The reversal of 1972145816 is 6185412791.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123259106 + ... + 123259121.

Almost surely, 2^1972145816 is an apocalyptic number.

It is an amenable number.

1972145816 is a deficient number, since it is larger than the sum of its proper divisors (1725627604).

1972145816 is a wasteful number, since it uses less digits than its factorization.

1972145816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246518233 (or 246518229 counting only the distinct ones).

The product of its digits is 120960, while the sum is 44.

The square root of 1972145816 is about 44408.8483975885. The cubic root of 1972145816 is about 1254.0446724638.

The spelling of 1972145816 in words is "one billion, nine hundred seventy-two million, one hundred forty-five thousand, eight hundred sixteen".