38811680721545 has 16 divisors (see below), whose sum is σ = 48113993809920. Its totient is φ = 30024259502400.

The previous prime is 38811680721529. The next prime is 38811680721547. The reversal of 38811680721545 is 54512708611883.

It is not a de Polignac number, because 38811680721545 - 2⁴ = 38811680721529 is a prime.

It is a super-2 number, since 2×38811680721545² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (38811680721547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97689926 + ... + 98086415.

It is an arithmetic number, because the mean of its divisors is an integer number (3007124613120).

Almost surely, 2^{38811680721545} is an apocalyptic number.

It is an amenable number.

38811680721545 is a deficient number, since it is larger than the sum of its proper divisors (9302313088375).

38811680721545 is a wasteful number, since it uses less digits than its factorization.

38811680721545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195777656.

The product of its (nonzero) digits is 12902400, while the sum is 59.

The spelling of 38811680721545 in words is "thirty-eight trillion, eight hundred eleven billion, six hundred eighty million, seven hundred twenty-one thousand, five hundred forty-five".