1351636481 has 12 divisors (see below), whose sum is σ = 1494755712. Its totient is φ = 1221111216.

The previous prime is 1351636471. The next prime is 1351636511. The reversal of 1351636481 is 1846361531.

It is not a de Polignac number, because 1351636481 - 2¹⁴ = 1351620097 is a prime.

It is a super-2 number, since 2×1351636481² = 3653842353540126722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1351636471) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 77141 + ... + 93026.

It is an arithmetic number, because the mean of its divisors is an integer number (124562976).

Almost surely, 2^1351636481 is an apocalyptic number.

It is an amenable number.

1351636481 is a deficient number, since it is larger than the sum of its proper divisors (143119231).

1351636481 is a wasteful number, since it uses less digits than its factorization.

1351636481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170240 (or 170227 counting only the distinct ones).

The product of its digits is 51840, while the sum is 38.

The square root of 1351636481 is about 36764.6090826490. The cubic root of 1351636481 is about 1105.6558505638.

The spelling of 1351636481 in words is "one billion, three hundred fifty-one million, six hundred thirty-six thousand, four hundred eighty-one".