38720450878937 has 2 divisors, whose sum is σ = 38720450878938. Its totient is φ = 38720450878936.

The previous prime is 38720450878931. The next prime is 38720450878951. The reversal of 38720450878937 is 73987805402783.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32430166173001 + 6290284705936 = 5694749^2 + 2508044^2 .

It is a cyclic number.

It is not a de Polignac number, because 38720450878937 - 2²⁴ = 38720434101721 is a prime.

It is not a weakly prime, because it can be changed into another prime (38720450878931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19360225439468 + 19360225439469.

It is an arithmetic number, because the mean of its divisors is an integer number (19360225439469).

Almost surely, 2^{38720450878937} is an apocalyptic number.

It is an amenable number.

38720450878937 is a deficient number, since it is larger than the sum of its proper divisors (1).

38720450878937 is an equidigital number, since it uses as much as digits as its factorization.

38720450878937 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 568995840, while the sum is 71.

The spelling of 38720450878937 in words is "thirty-eight trillion, seven hundred twenty billion, four hundred fifty million, eight hundred seventy-eight thousand, nine hundred thirty-seven".