39540457373 has 8 divisors (see below), whose sum is σ = 40120395000. Its totient is φ = 38961554688.

The previous prime is 39540457351. The next prime is 39540457391. The reversal of 39540457373 is 37375404593.

It can be written as a sum of positive squares in 4 ways, for example, as 19929815929 + 19610641444 = 141173^2 + 140038^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 39540457373 - 2²⁸ = 39272021917 is a prime.

It is a super-2 number, since 2×39540457373² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39540457343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181598 + ... + 334751.

It is an arithmetic number, because the mean of its divisors is an integer number (5015049375).

Almost surely, 2^39540457373 is an apocalyptic number.

It is an amenable number.

39540457373 is a deficient number, since it is larger than the sum of its proper divisors (579937627).

39540457373 is a wasteful number, since it uses less digits than its factorization.

39540457373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517471.

The product of its (nonzero) digits is 4762800, while the sum is 50.

The spelling of 39540457373 in words is "thirty-nine billion, five hundred forty million, four hundred fifty-seven thousand, three hundred seventy-three".