1979444253500 has 192 divisors, whose sum is σ = 5306875392000. Its totient is φ = 642946248000.

The previous prime is 1979444253463. The next prime is 1979444253503. The reversal of 1979444253500 is 53524449791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1979444253503) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2954765 + ... + 3562235.

It is an arithmetic number, because the mean of its divisors is an integer number (27639976000).

Almost surely, 2^{1979444253500} is an apocalyptic number.

1979444253500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1979444253500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2653437696000).

1979444253500 is an abundant number, since it is smaller than the sum of its proper divisors (3327431138500).

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

1979444253500 is a wasteful number, since it uses less digits than its factorization.

1979444253500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 607530 (or 607504 counting only the distinct ones).

The product of its (nonzero) digits is 5443200, while the sum is 53.

The spelling of 1979444253500 in words is "one trillion, nine hundred seventy-nine billion, four hundred forty-four million, two hundred fifty-three thousand, five hundred".