27678669501 has 32 divisors (see below), whose sum is σ = 44407767040. Its totient is φ = 14980261824.

The previous prime is 27678669481. The next prime is 27678669503. The reversal of 27678669501 is 10596687672.

It is not a de Polignac number, because 27678669501 - 2⁶ = 27678669437 is a prime.

It is a super-2 number, since 2×27678669501² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27678669503) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2681316 + ... + 2691618.

It is an arithmetic number, because the mean of its divisors is an integer number (1387742720).

Almost surely, 2^27678669501 is an apocalyptic number.

27678669501 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

27678669501 is a deficient number, since it is larger than the sum of its proper divisors (16729097539).

27678669501 is a wasteful number, since it uses less digits than its factorization.

27678669501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17065.

The product of its (nonzero) digits is 7620480, while the sum is 57.

The spelling of 27678669501 in words is "twenty-seven billion, six hundred seventy-eight million, six hundred sixty-nine thousand, five hundred one".