38070721905 has 16 divisors (see below), whose sum is σ = 60964761024. Its totient is φ = 20287183040.

The previous prime is 38070721903. The next prime is 38070721943. The reversal of 38070721905 is 50912707083.

38070721905 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 38070721905 - 2¹ = 38070721903 is a prime.

It is not an unprimeable number, because it can be changed into a prime (38070721901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1056819 + ... + 1092248.

It is an arithmetic number, because the mean of its divisors is an integer number (3810297564).

Almost surely, 2^38070721905 is an apocalyptic number.

It is an amenable number.

38070721905 is a deficient number, since it is larger than the sum of its proper divisors (22894039119).

38070721905 is a wasteful number, since it uses less digits than its factorization.

38070721905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2150256.

The product of its (nonzero) digits is 105840, while the sum is 42.

The spelling of 38070721905 in words is "thirty-eight billion, seventy million, seven hundred twenty-one thousand, nine hundred five".