83780121534 has 8 divisors (see below), whose sum is σ = 167560243080. Its totient is φ = 27926707176.

The previous prime is 83780121487. The next prime is 83780121541. The reversal of 83780121534 is 43512108738.

It is a sphenic number, since it is the product of 3 distinct primes.

83780121534 is an admirable number.

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, 6981676789 + ... + 6981676800.

It is an arithmetic number, because the mean of its divisors is an integer number (20945030385).

Almost surely, 2^83780121534 is an apocalyptic number.

83780121534 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

83780121534 is a wasteful number, since it uses less digits than its factorization.

83780121534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13963353594.

The product of its (nonzero) digits is 161280, while the sum is 42.

The spelling of 83780121534 in words is "eighty-three billion, seven hundred eighty million, one hundred twenty-one thousand, five hundred thirty-four".