1673555426 has 4 divisors (see below), whose sum is σ = 2510333142. Its totient is φ = 836777712.

The previous prime is 1673555423. The next prime is 1673555431. The reversal of 1673555426 is 6245553761.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6245553761 = 53 ⋅117840637.

It can be written as a sum of positive squares in only one way, i.e., 1517180401 + 156375025 = 38951^2 + 12505^2 .

It is not an unprimeable number, because it can be changed into a prime (1673555423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 418388855 + ... + 418388858.

Almost surely, 2^1673555426 is an apocalyptic number.

1673555426 is a deficient number, since it is larger than the sum of its proper divisors (836777716).

1673555426 is an equidigital number, since it uses as much as digits as its factorization.

1673555426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 836777715.

The product of its digits is 756000, while the sum is 44.

The square root of 1673555426 is about 40909.1117723179. Note that the first 3 decimals coincide. The cubic root of 1673555426 is about 1187.2623615484.

The spelling of 1673555426 in words is "one billion, six hundred seventy-three million, five hundred fifty-five thousand, four hundred twenty-six".