38078543978 has 4 divisors (see below), whose sum is σ = 57117815970. Its totient is φ = 19039271988.

The previous prime is 38078543957. The next prime is 38078543981. The reversal of 38078543978 is 87934587083.

38078543978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 23002878889 + 15075665089 = 151667^2 + 122783^2 .

It is a super-2 number, since 2×38078543978² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 38078543978.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9519635993 + ... + 9519635996.

Almost surely, 2^38078543978 is an apocalyptic number.

38078543978 is a deficient number, since it is larger than the sum of its proper divisors (19039271992).

38078543978 is a wasteful number, since it uses less digits than its factorization.

38078543978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19039271991.

The product of its (nonzero) digits is 40642560, while the sum is 62.

The spelling of 38078543978 in words is "thirty-eight billion, seventy-eight million, five hundred forty-three thousand, nine hundred seventy-eight".