1421166303765 has 48 divisors (see below), whose sum is σ = 2738419407360. Its totient is φ = 677081704320.

The previous prime is 1421166303763. The next prime is 1421166303787. The reversal of 1421166303765 is 5673036611241.

1421166303765 is a `hidden beast` number, since 1 + 4 + 2 + 1 + 1 + 6 + 630 + 3 + 7 + 6 + 5 = 666.

It is not a de Polignac number, because 1421166303765 - 2¹ = 1421166303763 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1421166303765.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421166303763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 39164835 + ... + 39201104.

It is an arithmetic number, because the mean of its divisors is an integer number (57050404320).

Almost surely, 2^{1421166303765} is an apocalyptic number.

1421166303765 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1421166303765 is a deficient number, since it is larger than the sum of its proper divisors (1317253103595).

1421166303765 is a wasteful number, since it uses less digits than its factorization.

1421166303765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78365994 (or 78365991 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 45.

The spelling of 1421166303765 in words is "one trillion, four hundred twenty-one billion, one hundred sixty-six million, three hundred three thousand, seven hundred sixty-five".