1972142580778 has 16 divisors (see below), whose sum is σ = 2991562035840. Its totient is φ = 974956049056.

The previous prime is 1972142580773. The next prime is 1972142580827. The reversal of 1972142580778 is 8770852412791.

It is not an unprimeable number, because it can be changed into a prime (1972142580773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5037951 + ... + 5415277.

It is an arithmetic number, because the mean of its divisors is an integer number (186972627240).

Almost surely, 2^{1972142580778} is an apocalyptic number.

1972142580778 is a deficient number, since it is larger than the sum of its proper divisors (1019419455062).

1972142580778 is a wasteful number, since it uses less digits than its factorization.

1972142580778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406781.

The product of its (nonzero) digits is 15805440, while the sum is 61.

The spelling of 1972142580778 in words is "one trillion, nine hundred seventy-two billion, one hundred forty-two million, five hundred eighty thousand, seven hundred seventy-eight".