15778082085 has 16 divisors (see below), whose sum is σ = 25468340544. Its totient is φ = 8340507392.

The previous prime is 15778082083. The next prime is 15778082093. The reversal of 15778082085 is 58028087751.

It is a cyclic number.

It is not a de Polignac number, because 15778082085 - 2¹ = 15778082083 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15778082083) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4652607 + ... + 4655996.

It is an arithmetic number, because the mean of its divisors is an integer number (1591771284).

Almost surely, 2^15778082085 is an apocalyptic number.

15778082085 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15778082085 is a deficient number, since it is larger than the sum of its proper divisors (9690258459).

15778082085 is a wasteful number, since it uses less digits than its factorization.

15778082085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9308724.

The product of its (nonzero) digits is 1254400, while the sum is 51.

The spelling of 15778082085 in words is "fifteen billion, seven hundred seventy-eight million, eighty-two thousand, eighty-five".