1538079940000 has 60 divisors (see below), whose sum is σ = 3783907413594. Its totient is φ = 615231968000.

The previous prime is 1538079939983. The next prime is 1538079940003. The reversal of 1538079940000 is 499708351.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 53688597264 + 1484391342736 = 231708^2 + 1218356^2 .

It is not an unprimeable number, because it can be changed into a prime (1538079940003) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 38431999 + ... + 38471998.

Almost surely, 2^{1538079940000} is an apocalyptic number.

1538079940000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1538079940000 is an abundant number, since it is smaller than the sum of its proper divisors (2245827473594).

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

1538079940000 is an frugal number, since it uses more digits than its factorization.

1538079940000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76904027 (or 76904004 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 46.

The spelling of 1538079940000 in words is "one trillion, five hundred thirty-eight billion, seventy-nine million, nine hundred forty thousand".