2171400639964 has 6 divisors (see below), whose sum is σ = 3799951119944. Its totient is φ = 1085700319980.

The previous prime is 2171400639931. The next prime is 2171400640033. The reversal of 2171400639964 is 4699360041712.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271425079992 + ... + 271425079999.

Almost surely, 2^{2171400639964} is an apocalyptic number.

It is an amenable number.

2171400639964 is a deficient number, since it is larger than the sum of its proper divisors (1628550479980).

2171400639964 is a wasteful number, since it uses less digits than its factorization.

2171400639964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542850159995 (or 542850159993 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 52.

The spelling of 2171400639964 in words is "two trillion, one hundred seventy-one billion, four hundred million, six hundred thirty-nine thousand, nine hundred sixty-four".