126355403501 has 4 divisors (see below), whose sum is σ = 128739467772. Its totient is φ = 123971339232.

The previous prime is 126355403483. The next prime is 126355403507. The reversal of 126355403501 is 105304553621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 105304553621 = 103 ⋅1022374307.

It can be written as a sum of positive squares in 2 ways, for example, as 41819841001 + 84535562500 = 204499^2 + 290750^2 .

It is a cyclic number.

It is not a de Polignac number, because 126355403501 - 2⁶ = 126355403437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126355403507) 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, 1192032056 + ... + 1192032161.

It is an arithmetic number, because the mean of its divisors is an integer number (32184866943).

Almost surely, 2^126355403501 is an apocalyptic number.

It is an amenable number.

126355403501 is a deficient number, since it is larger than the sum of its proper divisors (2384064271).

126355403501 is an equidigital number, since it uses as much as digits as its factorization.

126355403501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2384064270.

The product of its (nonzero) digits is 54000, while the sum is 35.

The spelling of 126355403501 in words is "one hundred twenty-six billion, three hundred fifty-five million, four hundred three thousand, five hundred one".