21777701721374 has 8 divisors (see below), whose sum is σ = 32671414419840. Its totient is φ = 10887230248096.

The previous prime is 21777701721367. The next prime is 21777701721439. The reversal of 21777701721374 is 47312710777712.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 810289499 + ... + 810316374.

It is an arithmetic number, because the mean of its divisors is an integer number (4083926802480).

Almost surely, 2^{21777701721374} is an apocalyptic number.

21777701721374 is a deficient number, since it is larger than the sum of its proper divisors (10893712698466).

21777701721374 is a wasteful number, since it uses less digits than its factorization.

21777701721374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1620612594.

The product of its (nonzero) digits is 5647152, while the sum is 56.

The spelling of 21777701721374 in words is "twenty-one trillion, seven hundred seventy-seven billion, seven hundred one million, seven hundred twenty-one thousand, three hundred seventy-four".