128620550279 has 16 divisors (see below), whose sum is σ = 143025168384. Its totient is φ = 114862600800.

The previous prime is 128620550273. The next prime is 128620550323. The reversal of 128620550279 is 972055026821.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 128620550279 - 2¹² = 128620546183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128620550273) 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, 1361162 + ... + 1452584.

It is an arithmetic number, because the mean of its divisors is an integer number (8939073024).

Almost surely, 2^128620550279 is an apocalyptic number.

128620550279 is a deficient number, since it is larger than the sum of its proper divisors (14404618105).

128620550279 is a wasteful number, since it uses less digits than its factorization.

128620550279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94958.

The product of its (nonzero) digits is 604800, while the sum is 47.

The spelling of 128620550279 in words is "one hundred twenty-eight billion, six hundred twenty million, five hundred fifty thousand, two hundred seventy-nine".