21677455452077 has 8 divisors (see below), whose sum is σ = 21975230931840. Its totient is φ = 21379702243680.

The previous prime is 21677455452049. The next prime is 21677455452119. The reversal of 21677455452077 is 77025455477612.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21677455452077 is a prime.

It is a super-2 number, since 2×21677455452077² (a number of 27 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 (21677455452047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3603077 + ... + 7505802.

It is an arithmetic number, because the mean of its divisors is an integer number (2746903866480).

Almost surely, 2^{21677455452077} is an apocalyptic number.

It is an amenable number.

21677455452077 is a deficient number, since it is larger than the sum of its proper divisors (297775479763).

21677455452077 is a wasteful number, since it uses less digits than its factorization.

21677455452077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11135683.

The product of its (nonzero) digits is 115248000, while the sum is 62.

The spelling of 21677455452077 in words is "twenty-one trillion, six hundred seventy-seven billion, four hundred fifty-five million, four hundred fifty-two thousand, seventy-seven".