137438909629 has 4 divisors (see below), whose sum is σ = 157073039584. Its totient is φ = 117804779676.

The previous prime is 137438909617. The next prime is 137438909633. The reversal of 137438909629 is 926909834731.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 926909834731 = 23 ⋅40300427597.

It is a cyclic number.

It is not a de Polignac number, because 137438909629 - 2³³ = 128848975037 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 (137438909669) 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, 9817064967 + ... + 9817064980.

It is an arithmetic number, because the mean of its divisors is an integer number (39268259896).

Almost surely, 2^137438909629 is an apocalyptic number.

It is an amenable number.

137438909629 is a deficient number, since it is larger than the sum of its proper divisors (19634129955).

137438909629 is an equidigital number, since it uses as much as digits as its factorization.

137438909629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19634129954.

The product of its (nonzero) digits is 17635968, while the sum is 61.

The spelling of 137438909629 in words is "one hundred thirty-seven billion, four hundred thirty-eight million, nine hundred nine thousand, six hundred twenty-nine".