1427297155866 has 48 divisors (see below), whose sum is σ = 3120098852520. Its totient is φ = 471516917760.

The previous prime is 1427297155861. The next prime is 1427297155897. The reversal of 1427297155866 is 6685517927241.

It is a happy number.

1427297155866 is a `hidden beast` number, since 1 + 4 + 2 + 7 + 2 + 9 + 71 + 558 + 6 + 6 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 489469543641 + 937827612225 = 699621^2 + 968415^2 .

It is a super-2 number, since 2×1427297155866² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1427297155861) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36106120 + ... + 36145628.

Almost surely, 2^{1427297155866} is an apocalyptic number.

1427297155866 is an abundant number, since it is smaller than the sum of its proper divisors (1692801696654).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1427297155866 is a wasteful number, since it uses less digits than its factorization.

1427297155866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57391 (or 57388 counting only the distinct ones).

The product of its digits is 50803200, while the sum is 63.

The spelling of 1427297155866 in words is "one trillion, four hundred twenty-seven billion, two hundred ninety-seven million, one hundred fifty-five thousand, eight hundred sixty-six".