37421323721 has 2 divisors, whose sum is σ = 37421323722. Its totient is φ = 37421323720.

The previous prime is 37421323697. The next prime is 37421323757. The reversal of 37421323721 is 12732312473.

37421323721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26989561225 + 10431762496 = 164285^2 + 102136^2 .

It is a cyclic number.

It is not a de Polignac number, because 37421323721 - 2¹⁴ = 37421307337 is a prime.

It is not a weakly prime, because it can be changed into another prime (37421323781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18710661860 + 18710661861.

It is an arithmetic number, because the mean of its divisors is an integer number (18710661861).

Almost surely, 2^37421323721 is an apocalyptic number.

It is an amenable number.

37421323721 is a deficient number, since it is larger than the sum of its proper divisors (1).

37421323721 is an equidigital number, since it uses as much as digits as its factorization.

37421323721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 35.

The spelling of 37421323721 in words is "thirty-seven billion, four hundred twenty-one million, three hundred twenty-three thousand, seven hundred twenty-one".