642620026246 has 16 divisors (see below), whose sum is σ = 1085481335808. Its totient is φ = 282677430600.

The previous prime is 642620026219. The next prime is 642620026253.

It is a happy number.

642620026246 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 642620026199 and 642620026208.

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, 471128370 + ... + 471129733.

It is an arithmetic number, because the mean of its divisors is an integer number (67842583488).

Almost surely, 2^642620026246 is an apocalyptic number.

642620026246 is a deficient number, since it is larger than the sum of its proper divisors (442861309562).

642620026246 is a wasteful number, since it uses less digits than its factorization.

642620026246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 942258147.

The product of its (nonzero) digits is 331776, while the sum is 40.

The spelling of 642620026246 in words is "six hundred forty-two billion, six hundred twenty million, twenty-six thousand, two hundred forty-six".