1515055861643 has 2 divisors, whose sum is σ = 1515055861644. Its totient is φ = 1515055861642.

The previous prime is 1515055861639. The next prime is 1515055861673. The reversal of 1515055861643 is 3461685505151.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1515055861643 - 2² = 1515055861639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1515055861591 and 1515055861600.

It is not a weakly prime, because it can be changed into another prime (1515055861673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 757527930821 + 757527930822.

It is an arithmetic number, because the mean of its divisors is an integer number (757527930822).

Almost surely, 2^{1515055861643} is an apocalyptic number.

1515055861643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1515055861643 is an equidigital number, since it uses as much as digits as its factorization.

1515055861643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160000, while the sum is 50.

The spelling of 1515055861643 in words is "one trillion, five hundred fifteen billion, fifty-five million, eight hundred sixty-one thousand, six hundred forty-three".