642611250255 has 32 divisors (see below), whose sum is σ = 1112146527744. Its totient is φ = 314968772736.

The previous prime is 642611250251. The next prime is 642611250293. The reversal of 642611250255 is 552052116246.

It is not a de Polignac number, because 642611250255 - 2² = 642611250251 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642611250251) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7214419 + ... + 7302948.

It is an arithmetic number, because the mean of its divisors is an integer number (34754578992).

Almost surely, 2^642611250255 is an apocalyptic number.

642611250255 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

642611250255 is a deficient number, since it is larger than the sum of its proper divisors (469535277489).

642611250255 is a wasteful number, since it uses less digits than its factorization.

642611250255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14517615.

The product of its (nonzero) digits is 144000, while the sum is 39.

The spelling of 642611250255 in words is "six hundred forty-two billion, six hundred eleven million, two hundred fifty thousand, two hundred fifty-five".