642766277075 has 24 divisors (see below), whose sum is σ = 858802231056. Its totient is φ = 474402672000.

The previous prime is 642766277057. The next prime is 642766277149. The reversal of 642766277075 is 570772667246.

It is not a de Polignac number, because 642766277075 - 2⁶ = 642766277011 is a prime.

It is a super-3 number, since 3×642766277075³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 73460 + ... + 1136190.

It is an arithmetic number, because the mean of its divisors is an integer number (35783426294).

Almost surely, 2^642766277075 is an apocalyptic number.

642766277075 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

642766277075 is a deficient number, since it is larger than the sum of its proper divisors (216035953981).

642766277075 is a wasteful number, since it uses less digits than its factorization.

642766277075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1064615 (or 1064610 counting only the distinct ones).

The product of its (nonzero) digits is 41489280, while the sum is 59.

The spelling of 642766277075 in words is "six hundred forty-two billion, seven hundred sixty-six million, two hundred seventy-seven thousand, seventy-five".