642626262626246 has 16 divisors (see below), whose sum is σ = 964900947164400. Its totient is φ = 320992617673728.

The previous prime is 642626262626213. The next prime is 642626262626251.

642626262626246 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 340733225 + ... + 342614043.

It is an arithmetic number, because the mean of its divisors is an integer number (60306309197775).

Almost surely, 2^{642626262626246} is an apocalyptic number.

642626262626246 is a deficient number, since it is larger than the sum of its proper divisors (322274684538154).

642626262626246 is a wasteful number, since it uses less digits than its factorization.

642626262626246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2051143.

The product of its digits is 286654464, while the sum is 62.

The spelling of 642626262626246 in words is "six hundred forty-two trillion, six hundred twenty-six billion, two hundred sixty-two million, six hundred twenty-six thousand, two hundred forty-six".