1501997870873 has 2 divisors, whose sum is σ = 1501997870874. Its totient is φ = 1501997870872.

The previous prime is 1501997870869. The next prime is 1501997870927. The reversal of 1501997870873 is 3780787991051.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1465242462784 + 36755408089 = 1210472^2 + 191717^2 .

It is a cyclic number.

It is not a de Polignac number, because 1501997870873 - 2² = 1501997870869 is a prime.

It is not a weakly prime, because it can be changed into another prime (1501997870833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 750998935436 + 750998935437.

It is an arithmetic number, because the mean of its divisors is an integer number (750998935437).

Almost surely, 2^{1501997870873} is an apocalyptic number.

It is an amenable number.

1501997870873 is a deficient number, since it is larger than the sum of its proper divisors (1).

1501997870873 is an equidigital number, since it uses as much as digits as its factorization.

1501997870873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26671680, while the sum is 65.

The spelling of 1501997870873 in words is "one trillion, five hundred one billion, nine hundred ninety-seven million, eight hundred seventy thousand, eight hundred seventy-three".