1351647720754 has 4 divisors (see below), whose sum is σ = 2027471581134. Its totient is φ = 675823860376.

The previous prime is 1351647720743. The next prime is 1351647720767. The reversal of 1351647720754 is 4570277461531.

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., 1288277210529 + 63370510225 = 1135023^2 + 251735^2 .

It is a super-2 number, since 2×1351647720754² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 337911930187 + ... + 337911930190.

Almost surely, 2^{1351647720754} is an apocalyptic number.

1351647720754 is a deficient number, since it is larger than the sum of its proper divisors (675823860380).

1351647720754 is an equidigital number, since it uses as much as digits as its factorization.

1351647720754 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 675823860379.

The product of its (nonzero) digits is 4939200, while the sum is 52.

The spelling of 1351647720754 in words is "one trillion, three hundred fifty-one billion, six hundred forty-seven million, seven hundred twenty thousand, seven hundred fifty-four".