1979825136 has 20 divisors (see below), whose sum is σ = 5114548392. Its totient is φ = 659941696.

The previous prime is 1979825101. The next prime is 1979825147. The reversal of 1979825136 is 6315289791.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20623131 + ... + 20623226.

Almost surely, 2^1979825136 is an apocalyptic number.

1979825136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1979825136 is an abundant number, since it is smaller than the sum of its proper divisors (3134723256).

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

1979825136 is a wasteful number, since it uses less digits than its factorization.

1979825136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41246368 (or 41246362 counting only the distinct ones).

The product of its digits is 816480, while the sum is 51.

The square root of 1979825136 is about 44495.2259911106. The cubic root of 1979825136 is about 1255.6702685640.

The spelling of 1979825136 in words is "one billion, nine hundred seventy-nine million, eight hundred twenty-five thousand, one hundred thirty-six".