38723464478645 has 16 divisors (see below), whose sum is σ = 49405734349488. Its totient is φ = 29035509596160.

The previous prime is 38723464478527. The next prime is 38723464478663. The reversal of 38723464478645 is 54687446432783.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 794938077649 + 37928526400996 = 891593^2 + 6158614^2 .

It is not a de Polignac number, because 38723464478645 - 2⁴⁴ = 21131278434229 is a prime.

It is a super-2 number, since 2×38723464478645² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

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, 945145844 + ... + 945186813.

It is an arithmetic number, because the mean of its divisors is an integer number (3087858396843).

Almost surely, 2^{38723464478645} is an apocalyptic number.

It is an amenable number.

38723464478645 is a deficient number, since it is larger than the sum of its proper divisors (10682269870843).

38723464478645 is a wasteful number, since it uses less digits than its factorization.

38723464478645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1890332920.

The product of its digits is 2601123840, while the sum is 71.

The spelling of 38723464478645 in words is "thirty-eight trillion, seven hundred twenty-three billion, four hundred sixty-four million, four hundred seventy-eight thousand, six hundred forty-five".