83780062780 has 24 divisors (see below), whose sum is σ = 177914968560. Its totient is φ = 33135484800.

The previous prime is 83780062771. The next prime is 83780062837. The reversal of 83780062780 is 8726008738.

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, 23531946 + ... + 23535505.

It is an arithmetic number, because the mean of its divisors is an integer number (7413123690).

Almost surely, 2^83780062780 is an apocalyptic number.

It is an amenable number.

83780062780 is an abundant number, since it is smaller than the sum of its proper divisors (94134905780).

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

83780062780 is a wasteful number, since it uses less digits than its factorization.

83780062780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47067549 (or 47067547 counting only the distinct ones).

The product of its (nonzero) digits is 903168, while the sum is 49.

The spelling of 83780062780 in words is "eighty-three billion, seven hundred eighty million, sixty-two thousand, seven hundred eighty".