15780081578 has 16 divisors (see below), whose sum is σ = 23889587040. Its totient is φ = 7817082000.

The previous prime is 15780081557. The next prime is 15780081623. The reversal of 15780081578 is 87518008751.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113528 + ... + 210828.

It is an arithmetic number, because the mean of its divisors is an integer number (1493099190).

Almost surely, 2^15780081578 is an apocalyptic number.

15780081578 is a deficient number, since it is larger than the sum of its proper divisors (8109505462).

15780081578 is a wasteful number, since it uses less digits than its factorization.

15780081578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98053.

The product of its (nonzero) digits is 627200, while the sum is 50.

The spelling of 15780081578 in words is "fifteen billion, seven hundred eighty million, eighty-one thousand, five hundred seventy-eight".