126431337553 has 4 divisors (see below), whose sum is σ = 126432633328. Its totient is φ = 126430041780.

The previous prime is 126431337523. The next prime is 126431337577. The reversal of 126431337553 is 355733134621.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 126431337553 - 2²¹ = 126429240401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126431337523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 488451 + ... + 701032.

It is an arithmetic number, because the mean of its divisors is an integer number (31608158332).

Almost surely, 2^126431337553 is an apocalyptic number.

It is an amenable number.

126431337553 is a deficient number, since it is larger than the sum of its proper divisors (1295775).

126431337553 is a wasteful number, since it uses less digits than its factorization.

126431337553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1295774.

The product of its digits is 680400, while the sum is 43.

The spelling of 126431337553 in words is "one hundred twenty-six billion, four hundred thirty-one million, three hundred thirty-seven thousand, five hundred fifty-three".