38778607064 has 8 divisors (see below), whose sum is σ = 72709888260. Its totient is φ = 19389303528.

The previous prime is 38778607019. The next prime is 38778607069. The reversal of 38778607064 is 46070687783.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×38778607064² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38778607069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2423662934 + ... + 2423662949.

Almost surely, 2^38778607064 is an apocalyptic number.

It is an amenable number.

38778607064 is a deficient number, since it is larger than the sum of its proper divisors (33931281196).

38778607064 is a wasteful number, since it uses less digits than its factorization.

38778607064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4847325889 (or 4847325885 counting only the distinct ones).

The product of its (nonzero) digits is 9483264, while the sum is 56.

The spelling of 38778607064 in words is "thirty-eight billion, seven hundred seventy-eight million, six hundred seven thousand, sixty-four".