38729577642 has 32 divisors (see below), whose sum is σ = 88530624384. Its totient is φ = 11064859200.

The previous prime is 38729577589. The next prime is 38729577647. The reversal of 38729577642 is 24677592783.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (38729577647) 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, 1109292 + ... + 1143672.

It is an arithmetic number, because the mean of its divisors is an integer number (2766582012).

Almost surely, 2^38729577642 is an apocalyptic number.

38729577642 is an abundant number, since it is smaller than the sum of its proper divisors (49801046742).

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

38729577642 is a wasteful number, since it uses less digits than its factorization.

38729577642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61214.

The product of its digits is 35562240, while the sum is 60.

The spelling of 38729577642 in words is "thirty-eight billion, seven hundred twenty-nine million, five hundred seventy-seven thousand, six hundred forty-two".