642461158 has 16 divisors (see below), whose sum is σ = 969408000. Its totient is φ = 319330312.

The previous prime is 642461147. The next prime is 642461159. The reversal of 642461158 is 851164246.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642461159) 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, 486423 + ... + 487741.

It is an arithmetic number, because the mean of its divisors is an integer number (60588000).

Almost surely, 2^642461158 is an apocalyptic number.

642461158 is a deficient number, since it is larger than the sum of its proper divisors (326946842).

642461158 is a wasteful number, since it uses less digits than its factorization.

642461158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2579.

The product of its digits is 46080, while the sum is 37.

The square root of 642461158 is about 25346.8175122637. The cubic root of 642461158 is about 862.8771305447.

The spelling of 642461158 in words is "six hundred forty-two million, four hundred sixty-one thousand, one hundred fifty-eight".