2171386757406 has 8 divisors (see below), whose sum is σ = 4342773514824. Its totient is φ = 723795585800.

The previous prime is 2171386757299. The next prime is 2171386757429. The reversal of 2171386757406 is 6047576831712.

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

2171386757406 is an admirable number.

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, 180948896445 + ... + 180948896456.

It is an arithmetic number, because the mean of its divisors is an integer number (542846689353).

Almost surely, 2^{2171386757406} is an apocalyptic number.

2171386757406 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2171386757406 is a wasteful number, since it uses less digits than its factorization.

2171386757406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361897792906.

The product of its (nonzero) digits is 11854080, while the sum is 57.

The spelling of 2171386757406 in words is "two trillion, one hundred seventy-one billion, three hundred eighty-six million, seven hundred fifty-seven thousand, four hundred six".