642612061505 has 8 divisors (see below), whose sum is σ = 775171828224. Its totient is φ = 511398079600.

The previous prime is 642612061489. The next prime is 642612061513. The reversal of 642612061505 is 505160216246.

642612061505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 642612061505 - 2⁴ = 642612061489 is a prime.

It is a Duffinian 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, 336445151 + ... + 336447060.

It is an arithmetic number, because the mean of its divisors is an integer number (96896478528).

Almost surely, 2^642612061505 is an apocalyptic number.

It is an amenable number.

642612061505 is a deficient number, since it is larger than the sum of its proper divisors (132559766719).

642612061505 is a wasteful number, since it uses less digits than its factorization.

642612061505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672892407.

The product of its (nonzero) digits is 86400, while the sum is 38.

The spelling of 642612061505 in words is "six hundred forty-two billion, six hundred twelve million, sixty-one thousand, five hundred five".