15780032070 has 128 divisors (see below), whose sum is σ = 42535342080. Its totient is φ = 3713566080.

The previous prime is 15780032069. The next prime is 15780032123. The reversal of 15780032070 is 7023008751.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2366401 + ... + 2373059.

It is an arithmetic number, because the mean of its divisors is an integer number (332307360).

Almost surely, 2^15780032070 is an apocalyptic number.

15780032070 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 15780032070, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21267671040).

15780032070 is an abundant number, since it is smaller than the sum of its proper divisors (26755310010).

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

15780032070 is a wasteful number, since it uses less digits than its factorization.

15780032070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6890.

The product of its (nonzero) digits is 11760, while the sum is 33.

The spelling of 15780032070 in words is "fifteen billion, seven hundred eighty million, thirty-two thousand, seventy".