126037661637 has 4 divisors (see below), whose sum is σ = 168050215520. Its totient is φ = 84025107756.

The previous prime is 126037661621. The next prime is 126037661639. The reversal of 126037661637 is 736166730621.

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.

It is not a de Polignac number, because 126037661637 - 2⁴ = 126037661621 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 (126037661639) 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, 21006276937 + ... + 21006276942.

It is an arithmetic number, because the mean of its divisors is an integer number (42012553880).

Almost surely, 2^126037661637 is an apocalyptic number.

It is an amenable number.

126037661637 is a deficient number, since it is larger than the sum of its proper divisors (42012553883).

126037661637 is an equidigital number, since it uses as much as digits as its factorization.

126037661637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42012553882.

The product of its (nonzero) digits is 1143072, while the sum is 48.

The spelling of 126037661637 in words is "one hundred twenty-six billion, thirty-seven million, six hundred sixty-one thousand, six hundred thirty-seven".