37381438621 has 4 divisors (see below), whose sum is σ = 37411659292. Its totient is φ = 37351217952.

The previous prime is 37381438571. The next prime is 37381438637. The reversal of 37381438621 is 12683418373.

It is a happy number.

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 11069354521 + 26312084100 = 105211^2 + 162210^2 .

It is a cyclic number.

It is not a de Polignac number, because 37381438621 - 2¹⁷ = 37381307549 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 (37381438651) 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 3 ways as a sum of consecutive naturals, for example, 15108480 + ... + 15110953.

It is an arithmetic number, because the mean of its divisors is an integer number (9352914823).

Almost surely, 2^37381438621 is an apocalyptic number.

It is an amenable number.

37381438621 is a deficient number, since it is larger than the sum of its proper divisors (30220671).

37381438621 is a wasteful number, since it uses less digits than its factorization.

37381438621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30220670.

The product of its digits is 580608, while the sum is 46.

The spelling of 37381438621 in words is "thirty-seven billion, three hundred eighty-one million, four hundred thirty-eight thousand, six hundred twenty-one".