1493457817426 has 4 divisors (see below), whose sum is σ = 2240186726142. Its totient is φ = 746728908712.

The previous prime is 1493457817391. The next prime is 1493457817429. The reversal of 1493457817426 is 6247187543941.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 858967508025 + 634490309401 = 926805^2 + 796549^2 .

It is not an unprimeable number, because it can be changed into a prime (1493457817429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 373364454355 + ... + 373364454358.

Almost surely, 2^{1493457817426} is an apocalyptic number.

1493457817426 is a deficient number, since it is larger than the sum of its proper divisors (746728908716).

1493457817426 is an equidigital number, since it uses as much as digits as its factorization.

1493457817426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746728908715.

The product of its digits is 40642560, while the sum is 61.

The spelling of 1493457817426 in words is "one trillion, four hundred ninety-three billion, four hundred fifty-seven million, eight hundred seventeen thousand, four hundred twenty-six".