128261573215 has 16 divisors (see below), whose sum is σ = 154803737088. Its totient is φ = 102017334016.

The previous prime is 128261573203. The next prime is 128261573227. The reversal of 128261573215 is 512375162821.

It is an interprime number because it is at equal distance from previous prime (128261573203) and next prime (128261573227).

It is a cyclic number.

It is not a de Polignac number, because 128261573215 - 2⁵ = 128261573183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 707394 + ... + 870016.

It is an arithmetic number, because the mean of its divisors is an integer number (9675233568).

Almost surely, 2^128261573215 is an apocalyptic number.

128261573215 is a deficient number, since it is larger than the sum of its proper divisors (26542163873).

128261573215 is a wasteful number, since it uses less digits than its factorization.

128261573215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163538.

The product of its digits is 201600, while the sum is 43.

The spelling of 128261573215 in words is "one hundred twenty-eight billion, two hundred sixty-one million, five hundred seventy-three thousand, two hundred fifteen".