1271621766475 has 12 divisors (see below), whose sum is σ = 1599019598160. Its totient is φ = 1002969279200.

The previous prime is 1271621766439. The next prime is 1271621766509. The reversal of 1271621766475 is 5746671261721.

It is not a de Polignac number, because 1271621766475 - 2¹⁹ = 1271621242187 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 358201540 + ... + 358205089.

It is an arithmetic number, because the mean of its divisors is an integer number (133251633180).

Almost surely, 2^{1271621766475} is an apocalyptic number.

1271621766475 is a deficient number, since it is larger than the sum of its proper divisors (327397831685).

1271621766475 is an equidigital number, since it uses as much as digits as its factorization.

1271621766475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 716406710 (or 716406705 counting only the distinct ones).

The product of its digits is 5927040, while the sum is 55.

The spelling of 1271621766475 in words is "one trillion, two hundred seventy-one billion, six hundred twenty-one million, seven hundred sixty-six thousand, four hundred seventy-five".