2151340640406 has 32 divisors (see below), whose sum is σ = 4945610671200. Its totient is φ = 692385492960.

The previous prime is 2151340640389. The next prime is 2151340640419. The reversal of 2151340640406 is 6040460431512.

2151340640406 is a `hidden beast` number, since 2 + 1 + 5 + 1 + 3 + 4 + 0 + 640 + 4 + 0 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 686888805 + ... + 686891936.

It is an arithmetic number, because the mean of its divisors is an integer number (154550333475).

Almost surely, 2^{2151340640406} is an apocalyptic number.

2151340640406 is an abundant number, since it is smaller than the sum of its proper divisors (2794270030794).

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

2151340640406 is a wasteful number, since it uses less digits than its factorization.

2151340640406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1373780781 (or 1373780775 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The spelling of 2151340640406 in words is "two trillion, one hundred fifty-one billion, three hundred forty million, six hundred forty thousand, four hundred six".