126404992501 has 8 divisors (see below), whose sum is σ = 126986107680. Its totient is φ = 125824775568.

The previous prime is 126404992499. The next prime is 126404992529. The reversal of 126404992501 is 105299404621.

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

It is a cyclic number.

It is not a de Polignac number, because 126404992501 - 2¹ = 126404992499 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 (126404998501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58350 + ... + 506176.

It is an arithmetic number, because the mean of its divisors is an integer number (15873263460).

Almost surely, 2^126404992501 is an apocalyptic number.

It is an amenable number.

126404992501 is a deficient number, since it is larger than the sum of its proper divisors (581115179).

126404992501 is a wasteful number, since it uses less digits than its factorization.

126404992501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449123.

The product of its (nonzero) digits is 155520, while the sum is 43.

The spelling of 126404992501 in words is "one hundred twenty-six billion, four hundred four million, nine hundred ninety-two thousand, five hundred one".