1979388938702 has 16 divisors (see below), whose sum is σ = 3393678075360. Its totient is φ = 848199571488.

The previous prime is 1979388938693. The next prime is 1979388938771. The reversal of 1979388938702 is 2078398839791.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1979388938702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9052577 + ... + 9268652.

It is an arithmetic number, because the mean of its divisors is an integer number (212104879710).

Almost surely, 2^{1979388938702} is an apocalyptic number.

1979388938702 is a deficient number, since it is larger than the sum of its proper divisors (1414289136658).

1979388938702 is a wasteful number, since it uses less digits than its factorization.

1979388938702 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18328955.

The product of its (nonzero) digits is 329204736, while the sum is 74.

The spelling of 1979388938702 in words is "one trillion, nine hundred seventy-nine billion, three hundred eighty-eight million, nine hundred thirty-eight thousand, seven hundred two".