255970139815 has 8 divisors (see below), whose sum is σ = 330792180768. Its totient is φ = 189024103200.

The previous prime is 255970139813. The next prime is 255970139849. The reversal of 255970139815 is 518931079552.

It is a happy number.

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

It is not a de Polignac number, because 255970139815 - 2¹ = 255970139813 is a prime.

It is a super-3 number, since 3×255970139815³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255970139813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1969001011 + ... + 1969001140.

It is an arithmetic number, because the mean of its divisors is an integer number (41349022596).

Almost surely, 2^255970139815 is an apocalyptic number.

255970139815 is a deficient number, since it is larger than the sum of its proper divisors (74822040953).

255970139815 is a wasteful number, since it uses less digits than its factorization.

255970139815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3938002169.

The product of its (nonzero) digits is 3402000, while the sum is 55.

The spelling of 255970139815 in words is "two hundred fifty-five billion, nine hundred seventy million, one hundred thirty-nine thousand, eight hundred fifteen".