126601437533 has 2 divisors, whose sum is σ = 126601437534. Its totient is φ = 126601437532.

The previous prime is 126601437493. The next prime is 126601437539. The reversal of 126601437533 is 335734106621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112931618809 + 13669818724 = 336053^2 + 116918^2 .

It is an emirp because it is prime and its reverse (335734106621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 126601437533 - 2³⁴ = 109421568349 is a prime.

It is a super-2 number, since 2×126601437533² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126601437539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63300718766 + 63300718767.

It is an arithmetic number, because the mean of its divisors is an integer number (63300718767).

Almost surely, 2^126601437533 is an apocalyptic number.

It is an amenable number.

126601437533 is a deficient number, since it is larger than the sum of its proper divisors (1).

126601437533 is an equidigital number, since it uses as much as digits as its factorization.

126601437533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 41.

The spelling of 126601437533 in words is "one hundred twenty-six billion, six hundred one million, four hundred thirty-seven thousand, five hundred thirty-three".