1515438157121 has 16 divisors (see below), whose sum is σ = 1844112864000. Its totient is φ = 1242471029184.

The previous prime is 1515438157091. The next prime is 1515438157201. The reversal of 1515438157121 is 1217518345151.

It is not a de Polignac number, because 1515438157121 - 2³⁸ = 1240560250177 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1515438157621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96039656 + ... + 96055433.

It is an arithmetic number, because the mean of its divisors is an integer number (115257054000).

Almost surely, 2^{1515438157121} is an apocalyptic number.

It is an amenable number.

1515438157121 is a deficient number, since it is larger than the sum of its proper divisors (328674706879).

1515438157121 is an equidigital number, since it uses as much as digits as its factorization.

1515438157121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192095133 (or 192095119 counting only the distinct ones).

The product of its digits is 168000, while the sum is 44.

The spelling of 1515438157121 in words is "one trillion, five hundred fifteen billion, four hundred thirty-eight million, one hundred fifty-seven thousand, one hundred twenty-one".