2155640611246 has 4 divisors (see below), whose sum is σ = 3233460916872. Its totient is φ = 1077820305622.

The previous prime is 2155640611237. The next prime is 2155640611337. The reversal of 2155640611246 is 6421160465512.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 538910152810 + ... + 538910152813.

It is an arithmetic number, because the mean of its divisors is an integer number (808365229218).

Almost surely, 2^{2155640611246} is an apocalyptic number.

2155640611246 is a deficient number, since it is larger than the sum of its proper divisors (1077820305626).

2155640611246 is a wasteful number, since it uses less digits than its factorization.

2155640611246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1077820305625.

The product of its (nonzero) digits is 345600, while the sum is 43.

The spelling of 2155640611246 in words is "two trillion, one hundred fifty-five billion, six hundred forty million, six hundred eleven thousand, two hundred forty-six".