1551890413673 has 2 divisors, whose sum is σ = 1551890413674. Its totient is φ = 1551890413672.

The previous prime is 1551890413669. The next prime is 1551890413753. The reversal of 1551890413673 is 3763140981551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 995548963984 + 556341449689 = 997772^2 + 745883^2 .

It is a cyclic number.

It is not a de Polignac number, because 1551890413673 - 2² = 1551890413669 is a prime.

It is not a weakly prime, because it can be changed into another prime (1551890413643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 775945206836 + 775945206837.

It is an arithmetic number, because the mean of its divisors is an integer number (775945206837).

Almost surely, 2^{1551890413673} is an apocalyptic number.

It is an amenable number.

1551890413673 is a deficient number, since it is larger than the sum of its proper divisors (1).

1551890413673 is an equidigital number, since it uses as much as digits as its factorization.

1551890413673 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2721600, while the sum is 53.

The spelling of 1551890413673 in words is "one trillion, five hundred fifty-one billion, eight hundred ninety million, four hundred thirteen thousand, six hundred seventy-three".