126669080836 has 9 divisors (see below), whose sum is σ = 221672137141. Its totient is φ = 63334184512.

The previous prime is 126669080777. The next prime is 126669080891. The reversal of 126669080836 is 638080966621.

It is a happy number.

The square root of 126669080836 is 355906.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 33434122500 + 93234958336 = 182850^2 + 305344^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 622836 + ... + 800788.

Almost surely, 2^126669080836 is an apocalyptic number.

126669080836 is the 355906-th square number.

It is an amenable number.

126669080836 is a deficient number, since it is larger than the sum of its proper divisors (95003056305).

126669080836 is an frugal number, since it uses more digits than its factorization.

126669080836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355910 (or 177955 counting only the distinct ones).

The product of its (nonzero) digits is 4478976, while the sum is 55.

The spelling of 126669080836 in words is "one hundred twenty-six billion, six hundred sixty-nine million, eighty thousand, eight hundred thirty-six".