39015345907081 has 2 divisors, whose sum is σ = 39015345907082. Its totient is φ = 39015345907080.

The previous prime is 39015345907037. The next prime is 39015345907157. The reversal of 39015345907081 is 18070954351093.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32773518233856 + 6241827673225 = 5724816^2 + 2498365^2 .

It is a cyclic number.

It is not a de Polignac number, because 39015345907081 - 2²³ = 39015337518473 is a prime.

It is a super-2 number, since 2×39015345907081² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (39015345907481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19507672953540 + 19507672953541.

It is an arithmetic number, because the mean of its divisors is an integer number (19507672953541).

Almost surely, 2^{39015345907081} is an apocalyptic number.

It is an amenable number.

39015345907081 is a deficient number, since it is larger than the sum of its proper divisors (1).

39015345907081 is an equidigital number, since it uses as much as digits as its factorization.

39015345907081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4082400, while the sum is 55.

The spelling of 39015345907081 in words is "thirty-nine trillion, fifteen billion, three hundred forty-five million, nine hundred seven thousand, eighty-one".