38723505721905 has 16 divisors (see below), whose sum is σ = 61960330840320. Its totient is φ = 20651629156608.

The previous prime is 38723505721897. The next prime is 38723505721913. The reversal of 38723505721905 is 50912750532783.

It is an interprime number because it is at equal distance from previous prime (38723505721897) and next prime (38723505721913).

It is not a de Polignac number, because 38723505721905 - 2³ = 38723505721897 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56348857 + ... + 57031926.

It is an arithmetic number, because the mean of its divisors is an integer number (3872520677520).

Almost surely, 2^{38723505721905} is an apocalyptic number.

It is an amenable number.

38723505721905 is a deficient number, since it is larger than the sum of its proper divisors (23236825118415).

38723505721905 is a wasteful number, since it uses less digits than its factorization.

38723505721905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113403560.

The product of its (nonzero) digits is 15876000, while the sum is 57.

The spelling of 38723505721905 in words is "thirty-eight trillion, seven hundred twenty-three billion, five hundred five million, seven hundred twenty-one thousand, nine hundred five".