38720538553 has 4 divisors (see below), whose sum is σ = 38857360528. Its totient is φ = 38583716580.

The previous prime is 38720538551. The next prime is 38720538607. The reversal of 38720538553 is 35583502783.

38720538553 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 35583502783 = 83 ⋅428716901.

It is a cyclic number.

It is not a de Polignac number, because 38720538553 - 2¹ = 38720538551 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 38720538497 and 38720538506.

It is not an unprimeable number, because it can be changed into a prime (38720538551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68410563 + ... + 68411128.

It is an arithmetic number, because the mean of its divisors is an integer number (9714340132).

Almost surely, 2^38720538553 is an apocalyptic number.

It is an amenable number.

38720538553 is a deficient number, since it is larger than the sum of its proper divisors (136821975).

38720538553 is a wasteful number, since it uses less digits than its factorization.

38720538553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136821974.

The product of its (nonzero) digits is 3024000, while the sum is 49.

The spelling of 38720538553 in words is "thirty-eight billion, seven hundred twenty million, five hundred thirty-eight thousand, five hundred fifty-three".