1515055861673 has 2 divisors, whose sum is σ = 1515055861674. Its totient is φ = 1515055861672.

The previous prime is 1515055861643. The next prime is 1515055861681. The reversal of 1515055861673 is 3761685505151.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1396150201744 + 118905659929 = 1181588^2 + 344827^2 .

It is a cyclic number.

It is not a de Polignac number, because 1515055861673 - 2¹² = 1515055857577 is a prime.

It is not a weakly prime, because it can be changed into another prime (1515055861643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 757527930836 + 757527930837.

It is an arithmetic number, because the mean of its divisors is an integer number (757527930837).

Almost surely, 2^{1515055861673} is an apocalyptic number.

It is an amenable number.

1515055861673 is a deficient number, since it is larger than the sum of its proper divisors (1).

1515055861673 is an equidigital number, since it uses as much as digits as its factorization.

1515055861673 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780000, while the sum is 53.

The spelling of 1515055861673 in words is "one trillion, five hundred fifteen billion, fifty-five million, eight hundred sixty-one thousand, six hundred seventy-three".