126406664553 has 8 divisors (see below), whose sum is σ = 181507005568. Its totient is φ = 77788716624.

The previous prime is 126406664521. The next prime is 126406664561. The reversal of 126406664553 is 355466604621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 126406664553 - 2⁵ = 126406664521 is a prime.

It is a super-4 number, since 4×126406664553⁴ (a number of 46 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126406664053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1620598225 + ... + 1620598302.

It is an arithmetic number, because the mean of its divisors is an integer number (22688375696).

Almost surely, 2^126406664553 is an apocalyptic number.

126406664553 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

126406664553 is a deficient number, since it is larger than the sum of its proper divisors (55100341015).

126406664553 is a wasteful number, since it uses less digits than its factorization.

126406664553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3241196543.

The product of its (nonzero) digits is 3110400, while the sum is 48.

The spelling of 126406664553 in words is "one hundred twenty-six billion, four hundred six million, six hundred sixty-four thousand, five hundred fifty-three".