1373553672457 has 4 divisors (see below), whose sum is σ = 1373562563076. Its totient is φ = 1373544781840.

The previous prime is 1373553672443. The next prime is 1373553672497. The reversal of 1373553672457 is 7542763553731.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1282576635081 + 90977037376 = 1132509^2 + 301624^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1373553672457 is a prime.

It is a super-2 number, since 2×1373553672457² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1373553672497) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4209394 + ... + 4523947.

It is an arithmetic number, because the mean of its divisors is an integer number (343390640769).

Almost surely, 2^{1373553672457} is an apocalyptic number.

It is an amenable number.

1373553672457 is a deficient number, since it is larger than the sum of its proper divisors (8890619).

1373553672457 is an equidigital number, since it uses as much as digits as its factorization.

1373553672457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8890618.

The product of its digits is 55566000, while the sum is 58.

The spelling of 1373553672457 in words is "one trillion, three hundred seventy-three billion, five hundred fifty-three million, six hundred seventy-two thousand, four hundred fifty-seven".