1540187880340 has 12 divisors (see below), whose sum is σ = 3234394548756. Its totient is φ = 616075152128.

The previous prime is 1540187880317. The next prime is 1540187880359. The reversal of 1540187880340 is 430887810451.

It can be written as a sum of positive squares in 2 ways, for example, as 766090570756 + 774097309584 = 875266^2 + 879828^2 .

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 38504696989 + ... + 38504697028.

It is an arithmetic number, because the mean of its divisors is an integer number (269532879063).

Almost surely, 2^{1540187880340} is an apocalyptic number.

1540187880340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1540187880340 is an abundant number, since it is smaller than the sum of its proper divisors (1694206668416).

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

1540187880340 is a wasteful number, since it uses less digits than its factorization.

1540187880340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77009394026 (or 77009394024 counting only the distinct ones).

The product of its (nonzero) digits is 860160, while the sum is 49.

The spelling of 1540187880340 in words is "one trillion, five hundred forty billion, one hundred eighty-seven million, eight hundred eighty thousand, three hundred forty".