38499813651645 has 64 divisors (see below), whose sum is σ = 72481214880000. Its totient is φ = 19322469347328.

The previous prime is 38499813651641. The next prime is 38499813651667. The reversal of 38499813651645 is 54615631899483.

It is a happy number.

38499813651645 is a `hidden beast` number, since 3 + 8 + 4 + 9 + 98 + 13 + 6 + 516 + 4 + 5 = 666.

It is not a de Polignac number, because 38499813651645 - 2² = 38499813651641 is a prime.

It is a super-2 number, since 2×38499813651645² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38499813651641) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 13923381 + ... + 16457829.

It is an arithmetic number, because the mean of its divisors is an integer number (1132518982500).

Almost surely, 2^{38499813651645} is an apocalyptic number.

It is an amenable number.

38499813651645 is a deficient number, since it is larger than the sum of its proper divisors (33981401228355).

38499813651645 is a wasteful number, since it uses less digits than its factorization.

38499813651645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2541099 (or 2541093 counting only the distinct ones).

The product of its digits is 671846400, while the sum is 72.

The spelling of 38499813651645 in words is "thirty-eight trillion, four hundred ninety-nine billion, eight hundred thirteen million, six hundred fifty-one thousand, six hundred forty-five".