38720538551 has 2 divisors, whose sum is σ = 38720538552. Its totient is φ = 38720538550.

The previous prime is 38720538533. The next prime is 38720538607. The reversal of 38720538551 is 15583502783.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 38720538551 - 2¹⁸ = 38720276407 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 38720538496 and 38720538505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38720538151) 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 as a sum of consecutive naturals, namely, 19360269275 + 19360269276.

It is an arithmetic number, because the mean of its divisors is an integer number (19360269276).

Almost surely, 2^38720538551 is an apocalyptic number.

38720538551 is a deficient number, since it is larger than the sum of its proper divisors (1).

38720538551 is an equidigital number, since it uses as much as digits as its factorization.

38720538551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008000, while the sum is 47.

The spelling of 38720538551 in words is "thirty-eight billion, seven hundred twenty million, five hundred thirty-eight thousand, five hundred fifty-one".