1426708721637 has 12 divisors (see below), whose sum is σ = 2061536736064. Its totient is φ = 950799801960.

The previous prime is 1426708721629. The next prime is 1426708721687. The reversal of 1426708721637 is 7361278076241.

It is not a de Polignac number, because 1426708721637 - 2³ = 1426708721629 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 (1426708721687) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28252189 + ... + 28302642.

Almost surely, 2^{1426708721637} is an apocalyptic number.

It is an amenable number.

1426708721637 is a deficient number, since it is larger than the sum of its proper divisors (634828014427).

1426708721637 is a wasteful number, since it uses less digits than its factorization.

1426708721637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56557640 (or 56557637 counting only the distinct ones).

The product of its (nonzero) digits is 4741632, while the sum is 54.

The spelling of 1426708721637 in words is "one trillion, four hundred twenty-six billion, seven hundred eight million, seven hundred twenty-one thousand, six hundred thirty-seven".