1979126136 has 192 divisors, whose sum is σ = 6076062720. Its totient is φ = 599840640.

The previous prime is 1979126099. The next prime is 1979126137. The reversal of 1979126136 is 6316219791.

1979126136 is a `hidden beast` number, since 19 + 7 + 9 + 12 + 613 + 6 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1979126091 and 1979126100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1979126137) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1793761 + ... + 1794863.

It is an arithmetic number, because the mean of its divisors is an integer number (31646160).

Almost surely, 2^1979126136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1979126136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3038031360).

1979126136 is an abundant number, since it is smaller than the sum of its proper divisors (4096936584).

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

1979126136 is a wasteful number, since it uses less digits than its factorization.

1979126136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1208 (or 1192 counting only the distinct ones).

The product of its digits is 122472, while the sum is 45.

The square root of 1979126136 is about 44487.3705224303. The cubic root of 1979126136 is about 1255.5224748999.

The spelling of 1979126136 in words is "one billion, nine hundred seventy-nine million, one hundred twenty-six thousand, one hundred thirty-six".