38749725909421 has 2 divisors, whose sum is σ = 38749725909422. Its totient is φ = 38749725909420.

The previous prime is 38749725909361. The next prime is 38749725909481. The reversal of 38749725909421 is 12490952794783.

It is a balanced prime because it is at equal distance from previous prime (38749725909361) and next prime (38749725909481).

It can be written as a sum of positive squares in only one way, i.e., 38136614985225 + 613110924196 = 6175485^2 + 783014^2 .

It is a cyclic number.

It is not a de Polignac number, because 38749725909421 - 2⁹ = 38749725908909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38749725909481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19374862954710 + 19374862954711.

It is an arithmetic number, because the mean of its divisors is an integer number (19374862954711).

Almost surely, 2^{38749725909421} is an apocalyptic number.

It is an amenable number.

38749725909421 is a deficient number, since it is larger than the sum of its proper divisors (1).

38749725909421 is an equidigital number, since it uses as much as digits as its factorization.

38749725909421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 274337280, while the sum is 70.

The spelling of 38749725909421 in words is "thirty-eight trillion, seven hundred forty-nine billion, seven hundred twenty-five million, nine hundred nine thousand, four hundred twenty-one".