427695917381 has 8 divisors (see below), whose sum is σ = 438798498264. Its totient is φ = 416625287680.

The previous prime is 427695917377. The next prime is 427695917401. The reversal of 427695917381 is 183719596724.

It can be written as a sum of positive squares in 4 ways, for example, as 10153786756 + 417542130625 = 100766^2 + 646175^2 .

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 427695917381 - 2² = 427695917377 is a prime.

It is a super-2 number, since 2×427695917381² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (427695917321) 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, 7960676 + ... + 8014221.

It is an arithmetic number, because the mean of its divisors is an integer number (54849812283).

Almost surely, 2^427695917381 is an apocalyptic number.

427695917381 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

427695917381 is a deficient number, since it is larger than the sum of its proper divisors (11102580883).

427695917381 is a wasteful number, since it uses less digits than its factorization.

427695917381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15975591.

The product of its digits is 22861440, while the sum is 62.

The spelling of 427695917381 in words is "four hundred twenty-seven billion, six hundred ninety-five million, nine hundred seventeen thousand, three hundred eighty-one".