999999999743970 has 64 divisors (see below), whose sum is σ = 2477424338887680. Its totient is φ = 258063996825600.

The previous prime is 999999999743903. The next prime is 999999999743971. The reversal of 999999999743970 is 79347999999999.

It is not an unprimeable number, because it can be changed into a prime (999999999743971) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 718828426 + ... + 720218234.

It is an arithmetic number, because the mean of its divisors is an integer number (38709755295120).

Almost surely, 2^{999999999743970} is an apocalyptic number.

999999999743970 is an abundant number, since it is smaller than the sum of its proper divisors (1477424339143710).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

999999999743970 is a wasteful number, since it uses less digits than its factorization.

999999999743970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2163531.

The product of its (nonzero) digits is 2050229227788, while the sum is 111.

The spelling of 999999999743970 in words is "nine hundred ninety-nine trillion, nine hundred ninety-nine billion, nine hundred ninety-nine million, seven hundred forty-three thousand, nine hundred seventy".