1351637643987 has 8 divisors (see below), whose sum is σ = 2002426139280. Its totient is φ = 901091762640.

The previous prime is 1351637643959. The next prime is 1351637644039. The reversal of 1351637643987 is 7893467361531.

1351637643987 is a `hidden beast` number, since 1 + 3 + 51 + 6 + 3 + 76 + 439 + 87 = 666.

It is not a de Polignac number, because 1351637643987 - 2¹⁰ = 1351637642963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1351637643907) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 25030326714 + ... + 25030326767.

It is an arithmetic number, because the mean of its divisors is an integer number (250303267410).

Almost surely, 2^{1351637643987} is an apocalyptic number.

1351637643987 is a deficient number, since it is larger than the sum of its proper divisors (650788495293).

1351637643987 is an equidigital number, since it uses as much as digits as its factorization.

1351637643987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50060653490 (or 50060653484 counting only the distinct ones).

The product of its digits is 68584320, while the sum is 63.

The spelling of 1351637643987 in words is "one trillion, three hundred fifty-one billion, six hundred thirty-seven million, six hundred forty-three thousand, nine hundred eighty-seven".