2540138635408 has 40 divisors (see below), whose sum is σ = 5407554831840. Its totient is φ = 1146301923840.

The previous prime is 2540138635367. The next prime is 2540138635423. The reversal of 2540138635408 is 8045368310452.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51891385 + ... + 51940312.

It is an arithmetic number, because the mean of its divisors is an integer number (135188870796).

Almost surely, 2^{2540138635408} is an apocalyptic number.

It is an amenable number.

2540138635408 is an abundant number, since it is smaller than the sum of its proper divisors (2867416196432).

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

2540138635408 is a wasteful number, since it uses less digits than its factorization.

2540138635408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103831855 (or 103831849 counting only the distinct ones).

The product of its (nonzero) digits is 2764800, while the sum is 49.

The spelling of 2540138635408 in words is "two trillion, five hundred forty billion, one hundred thirty-eight million, six hundred thirty-five thousand, four hundred eight".