637400424421 has 8 divisors (see below), whose sum is σ = 710415334080. Its totient is φ = 568332266688.

The previous prime is 637400424407. The next prime is 637400424431. The reversal of 637400424421 is 124424004736.

It is a happy number.

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 637400424421 - 2⁷ = 637400424293 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 (637400424431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 986687641 + ... + 986688286.

It is an arithmetic number, because the mean of its divisors is an integer number (88801916760).

Almost surely, 2^637400424421 is an apocalyptic number.

It is an amenable number.

637400424421 is a deficient number, since it is larger than the sum of its proper divisors (73014909659).

637400424421 is a wasteful number, since it uses less digits than its factorization.

637400424421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1973375963.

The product of its (nonzero) digits is 129024, while the sum is 37.

The spelling of 637400424421 in words is "six hundred thirty-seven billion, four hundred million, four hundred twenty-four thousand, four hundred twenty-one".