37921009702109 has 4 divisors (see below), whose sum is σ = 37925300874204. Its totient is φ = 37916718530016.

The previous prime is 37921009702007. The next prime is 37921009702223. The reversal of 37921009702109 is 90120790012973.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35669824546084 + 2251185156025 = 5972422^2 + 1500395^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-37921009702109 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 (37921009762109) 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, 2145572792 + ... + 2145590465.

It is an arithmetic number, because the mean of its divisors is an integer number (9481325218551).

Almost surely, 2^{37921009702109} is an apocalyptic number.

It is an amenable number.

37921009702109 is a deficient number, since it is larger than the sum of its proper divisors (4291172095).

37921009702109 is an equidigital number, since it uses as much as digits as its factorization.

37921009702109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4291172094.

The product of its (nonzero) digits is 428652, while the sum is 50.

The spelling of 37921009702109 in words is "thirty-seven trillion, nine hundred twenty-one billion, nine million, seven hundred two thousand, one hundred nine".