2171670220774 has 4 divisors (see below), whose sum is σ = 3257505331164. Its totient is φ = 1085835110386.

The previous prime is 2171670220771. The next prime is 2171670220777. The reversal of 2171670220774 is 4770220761712.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (2171670220771) and next prime (2171670220777).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2171670220771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 542917555192 + ... + 542917555195.

It is an arithmetic number, because the mean of its divisors is an integer number (814376332791).

Almost surely, 2^{2171670220774} is an apocalyptic number.

2171670220774 is a deficient number, since it is larger than the sum of its proper divisors (1085835110390).

2171670220774 is a wasteful number, since it uses less digits than its factorization.

2171670220774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1085835110389.

The product of its (nonzero) digits is 460992, while the sum is 46.

The spelling of 2171670220774 in words is "two trillion, one hundred seventy-one billion, six hundred seventy million, two hundred twenty thousand, seven hundred seventy-four".