642370155633742 has 4 divisors (see below), whose sum is σ = 963555233450616. Its totient is φ = 321185077816870.

The previous prime is 642370155633719. The next prime is 642370155633823. The reversal of 642370155633742 is 247336551073246.

642370155633742 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160592538908434 + ... + 160592538908437.

It is an arithmetic number, because the mean of its divisors is an integer number (240888808362654).

Almost surely, 2^{642370155633742} is an apocalyptic number.

642370155633742 is a deficient number, since it is larger than the sum of its proper divisors (321185077816874).

642370155633742 is a wasteful number, since it uses less digits than its factorization.

642370155633742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321185077816873.

The product of its (nonzero) digits is 76204800, while the sum is 58.

The spelling of 642370155633742 in words is "six hundred forty-two trillion, three hundred seventy billion, one hundred fifty-five million, six hundred thirty-three thousand, seven hundred forty-two".