128476262499 has 24 divisors (see below), whose sum is σ = 186463660032. Its totient is φ = 78648317280.

The previous prime is 128476262401. The next prime is 128476262501. The reversal of 128476262499 is 994262674821.

It is a happy number.

It is not a de Polignac number, because 128476262499 - 2¹⁶ = 128476196963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128476262399) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 566527 + ... + 760200.

It is an arithmetic number, because the mean of its divisors is an integer number (7769319168).

Almost surely, 2^128476262499 is an apocalyptic number.

128476262499 is a deficient number, since it is larger than the sum of its proper divisors (57987397533).

128476262499 is a wasteful number, since it uses less digits than its factorization.

128476262499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1326947 (or 1326934 counting only the distinct ones).

The product of its digits is 20901888, while the sum is 60.

It can be divided in two parts, 1284762 and 62499, that added together give a triangular number (1347261 = T₁₆₄₁).

The spelling of 128476262499 in words is "one hundred twenty-eight billion, four hundred seventy-six million, two hundred sixty-two thousand, four hundred ninety-nine".