1421166401955 has 16 divisors (see below), whose sum is σ = 2526518048160. Its totient is φ = 757955414304.

The previous prime is 1421166401951. The next prime is 1421166401957. The reversal of 1421166401955 is 5591046611241.

1421166401955 is a `hidden beast` number, since 1 + 42 + 116 + 6 + 401 + 95 + 5 = 666.

It is not a de Polignac number, because 1421166401955 - 2² = 1421166401951 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 1421166401955.

It is not an unprimeable number, because it can be changed into a prime (1421166401951) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5263579132 + ... + 5263579401.

It is an arithmetic number, because the mean of its divisors is an integer number (157907378010).

Almost surely, 2^{1421166401955} is an apocalyptic number.

1421166401955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1421166401955 is a deficient number, since it is larger than the sum of its proper divisors (1105351646205).

1421166401955 is a wasteful number, since it uses less digits than its factorization.

1421166401955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10527158547 (or 10527158541 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 45.

The spelling of 1421166401955 in words is "one trillion, four hundred twenty-one billion, one hundred sixty-six million, four hundred one thousand, nine hundred fifty-five".