1540279138890 has 16 divisors (see below), whose sum is σ = 3696669933408. Its totient is φ = 410741103696.

The previous prime is 1540279138841. The next prime is 1540279138903. The reversal of 1540279138890 is 988319720451.

It is a self number, because there is not a number n which added to its sum of digits gives 1540279138890.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25671318952 + ... + 25671319011.

It is an arithmetic number, because the mean of its divisors is an integer number (231041870838).

Almost surely, 2^{1540279138890} is an apocalyptic number.

1540279138890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1540279138890 is an abundant number, since it is smaller than the sum of its proper divisors (2156390794518).

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

1540279138890 is a wasteful number, since it uses less digits than its factorization.

1540279138890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51342637973.

The product of its (nonzero) digits is 4354560, while the sum is 57.

The spelling of 1540279138890 in words is "one trillion, five hundred forty billion, two hundred seventy-nine million, one hundred thirty-eight thousand, eight hundred ninety".