38778234647651 has 16 divisors (see below), whose sum is σ = 39912994944000. Its totient is φ = 37662994353600.

The previous prime is 38778234647611. The next prime is 38778234647657. The reversal of 38778234647651 is 15674643287783.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38778234647651 is a prime.

It is a super-2 number, since 2×38778234647651² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (71).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38778234647657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9610001 + ... + 13034898.

It is an arithmetic number, because the mean of its divisors is an integer number (2494562184000).

Almost surely, 2^{38778234647651} is an apocalyptic number.

38778234647651 is a deficient number, since it is larger than the sum of its proper divisors (1134760296349).

38778234647651 is a wasteful number, since it uses less digits than its factorization.

38778234647651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22645330.

The product of its digits is 1137991680, while the sum is 71.

The spelling of 38778234647651 in words is "thirty-eight trillion, seven hundred seventy-eight billion, two hundred thirty-four million, six hundred forty-seven thousand, six hundred fifty-one".