39478113481 has 9 divisors (see below), whose sum is σ = 39655943719. Its totient is φ = 39301079800.

The previous prime is 39478113469. The next prime is 39478113487. The reversal of 39478113481 is 18431187493.

The square root of 39478113481 is 198691.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 12654225081 + 26823888400 = 112491^2 + 163780^2 .

It is not a de Polignac number, because 39478113481 - 2¹⁷ = 39477982409 is a prime.

It is a super-2 number, since 2×39478113481² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39478113487) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 85635591 + ... + 85636051.

Almost surely, 2^39478113481 is an apocalyptic number.

39478113481 is the 198691-st square number.

39478113481 is the 99346-th centered octagonal number.

It is an amenable number.

39478113481 is a deficient number, since it is larger than the sum of its proper divisors (177830238).

39478113481 is an frugal number, since it uses more digits than its factorization.

39478113481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1784 (or 892 counting only the distinct ones).

The product of its digits is 580608, while the sum is 49.

Multiplying 39478113481 by its sum of digits (49), we get a square (1934427560569 = 1390837²).

The spelling of 39478113481 in words is "thirty-nine billion, four hundred seventy-eight million, one hundred thirteen thousand, four hundred eighty-one".