642412077 has 8 divisors (see below), whose sum is σ = 860609760. Its totient is φ = 426244560.

The previous prime is 642412063. The next prime is 642412087. The reversal of 642412077 is 770214246.

642412077 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 642412077 - 2¹¹ = 642410029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642412087) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 506802 + ... + 508067.

It is an arithmetic number, because the mean of its divisors is an integer number (107576220).

Almost surely, 2^642412077 is an apocalyptic number.

It is an amenable number.

642412077 is a deficient number, since it is larger than the sum of its proper divisors (218197683).

642412077 is a wasteful number, since it uses less digits than its factorization.

642412077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1015083.

The product of its (nonzero) digits is 18816, while the sum is 33.

The square root of 642412077 is about 25345.8493051624. The cubic root of 642412077 is about 862.8551567385.

The spelling of 642412077 in words is "six hundred forty-two million, four hundred twelve thousand, seventy-seven".