38154778000 has 80 divisors (see below), whose sum is σ = 95439717360. Its totient is φ = 14735616000.

The previous prime is 38154777961. The next prime is 38154778003. The reversal of 38154778000 is 87745183.

It can be written as a sum of positive squares in 8 ways, for example, as 7365758976 + 30789019024 = 85824^2 + 175468^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (38154778003) 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, 270921 + ... + 386920.

It is an arithmetic number, because the mean of its divisors is an integer number (1192996467).

Almost surely, 2^38154778000 is an apocalyptic number.

It is an amenable number.

38154778000 is an abundant number, since it is smaller than the sum of its proper divisors (57284939360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

38154778000 is a wasteful number, since it uses less digits than its factorization.

38154778000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657893 (or 657877 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 43.

The spelling of 38154778000 in words is "thirty-eight billion, one hundred fifty-four million, seven hundred seventy-eight thousand".