1540883628749 has 4 divisors (see below), whose sum is σ = 1540937442300. Its totient is φ = 1540829815200.

The previous prime is 1540883628731. The next prime is 1540883628811. The reversal of 1540883628749 is 9478263880451.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 556095335524 + 984788293225 = 745718^2 + 992365^2 .

It is a cyclic number.

It is not a de Polignac number, because 1540883628749 - 2³⁶ = 1472164152013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1540883628149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26863802 + ... + 26921099.

It is an arithmetic number, because the mean of its divisors is an integer number (385234360575).

It is a 2-persistent number, because it is pandigital, and so is 2⋅1540883628749 = 3081767257498, but 3⋅1540883628749 = 4622650886247 is not.

Almost surely, 2^{1540883628749} is an apocalyptic number.

It is an amenable number.

1540883628749 is a deficient number, since it is larger than the sum of its proper divisors (53813551).

1540883628749 is an equidigital number, since it uses as much as digits as its factorization.

1540883628749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53813550.

The product of its (nonzero) digits is 92897280, while the sum is 65.

The spelling of 1540883628749 in words is "one trillion, five hundred forty billion, eight hundred eighty-three million, six hundred twenty-eight thousand, seven hundred forty-nine".