1900946047457 has 2 divisors, whose sum is σ = 1900946047458. Its totient is φ = 1900946047456.

The previous prime is 1900946047453. The next prime is 1900946047547. The reversal of 1900946047457 is 7547406490091.

Together with next prime (1900946047547) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1631829959761 + 269116087696 = 1277431^2 + 518764^2 .

It is a cyclic number.

It is not a de Polignac number, because 1900946047457 - 2² = 1900946047453 is a prime.

It is a super-2 number, since 2×1900946047457² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1900946047453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 950473023728 + 950473023729.

It is an arithmetic number, because the mean of its divisors is an integer number (950473023729).

Almost surely, 2^{1900946047457} is an apocalyptic number.

It is an amenable number.

1900946047457 is a deficient number, since it is larger than the sum of its proper divisors (1).

1900946047457 is an equidigital number, since it uses as much as digits as its factorization.

1900946047457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7620480, while the sum is 56.

The spelling of 1900946047457 in words is "one trillion, nine hundred billion, nine hundred forty-six million, forty-seven thousand, four hundred fifty-seven".