27978577046 has 16 divisors (see below), whose sum is σ = 49259580576. Its totient is φ = 11666742336.

The previous prime is 27978576991. The next prime is 27978577049. The reversal of 27978577046 is 64077587972.

It is a super-2 number, since 2×27978577046² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 27978577046.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27978577049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27005831 + ... + 27006866.

It is an arithmetic number, because the mean of its divisors is an integer number (3078723786).

Almost surely, 2^27978577046 is an apocalyptic number.

27978577046 is a deficient number, since it is larger than the sum of its proper divisors (21281003530).

27978577046 is a wasteful number, since it uses less digits than its factorization.

27978577046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54012743.

The product of its (nonzero) digits is 41489280, while the sum is 62.

The spelling of 27978577046 in words is "twenty-seven billion, nine hundred seventy-eight million, five hundred seventy-seven thousand, forty-six".