427188399749 has 8 divisors (see below), whose sum is σ = 455878683648. Its totient is φ = 398893844160.

The previous prime is 427188399731. The next prime is 427188399761. The reversal of 427188399749 is 947993881724.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 427188399749 - 2¹⁶ = 427188334213 is a prime.

It is a super-2 number, since 2×427188399749² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (427188399769) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98929847 + ... + 98934164.

It is an arithmetic number, because the mean of its divisors is an integer number (56984835456).

Almost surely, 2^427188399749 is an apocalyptic number.

It is an amenable number.

427188399749 is a deficient number, since it is larger than the sum of its proper divisors (28690283899).

427188399749 is a wasteful number, since it uses less digits than its factorization.

427188399749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197864155.

The product of its digits is 219469824, while the sum is 71.

The spelling of 427188399749 in words is "four hundred twenty-seven billion, one hundred eighty-eight million, three hundred ninety-nine thousand, seven hundred forty-nine".