1245729663494 has 4 divisors (see below), whose sum is σ = 1868594495244. Its totient is φ = 622864831746.

The previous prime is 1245729663461. The next prime is 1245729663539. The reversal of 1245729663494 is 4943669275421.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311432415872 + ... + 311432415875.

It is an arithmetic number, because the mean of its divisors is an integer number (467148623811).

Almost surely, 2^{1245729663494} is an apocalyptic number.

1245729663494 is a deficient number, since it is larger than the sum of its proper divisors (622864831750).

1245729663494 is an equidigital number, since it uses as much as digits as its factorization.

1245729663494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622864831749.

The product of its digits is 78382080, while the sum is 62.

The spelling of 1245729663494 in words is "one trillion, two hundred forty-five billion, seven hundred twenty-nine million, six hundred sixty-three thousand, four hundred ninety-four".