128405767473854 has 16 divisors (see below), whose sum is σ = 213030774313728. Its totient is φ = 57662465226912.

The previous prime is 128405767473839. The next prime is 128405767473871. The reversal of 128405767473854 is 458374767504821.

It is a super-2 number, since 2×128405767473854² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66738963422 + ... + 66738965345.

It is an arithmetic number, because the mean of its divisors is an integer number (13314423394608).

Almost surely, 2^{128405767473854} is an apocalyptic number.

128405767473854 is a deficient number, since it is larger than the sum of its proper divisors (84625006839874).

128405767473854 is a wasteful number, since it uses less digits than its factorization.

128405767473854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133477928819.

The product of its (nonzero) digits is 1264435200, while the sum is 71.

The spelling of 128405767473854 in words is "one hundred twenty-eight trillion, four hundred five billion, seven hundred sixty-seven million, four hundred seventy-three thousand, eight hundred fifty-four".