1815013404541 has 2 divisors, whose sum is σ = 1815013404542. Its totient is φ = 1815013404540.

The previous prime is 1815013404487. The next prime is 1815013404583. The reversal of 1815013404541 is 1454043105181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1307992505625 + 507020898916 = 1143675^2 + 712054^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1815013404541 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1815013404541.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1815013407541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 907506702270 + 907506702271.

It is an arithmetic number, because the mean of its divisors is an integer number (907506702271).

Almost surely, 2^{1815013404541} is an apocalyptic number.

It is an amenable number.

1815013404541 is a deficient number, since it is larger than the sum of its proper divisors (1).

1815013404541 is an equidigital number, since it uses as much as digits as its factorization.

1815013404541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38400, while the sum is 37.

The spelling of 1815013404541 in words is "one trillion, eight hundred fifteen billion, thirteen million, four hundred four thousand, five hundred forty-one".