115142643646 has 4 divisors (see below), whose sum is σ = 172713965472. Its totient is φ = 57571321822.

The previous prime is 115142643643. The next prime is 115142643673. The reversal of 115142643646 is 646346241511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 646346241511 = 6133 ⋅105388267.

It is a super-6 number, since 6×115142643646⁶ (a number of 68 digits) contains 666666 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115142643643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28785660910 + ... + 28785660913.

It is an arithmetic number, because the mean of its divisors is an integer number (43178491368).

Almost surely, 2^115142643646 is an apocalyptic number.

115142643646 is a deficient number, since it is larger than the sum of its proper divisors (57571321826).

115142643646 is an equidigital number, since it uses as much as digits as its factorization.

115142643646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57571321825.

The product of its digits is 414720, while the sum is 43.

The spelling of 115142643646 in words is "one hundred fifteen billion, one hundred forty-two million, six hundred forty-three thousand, six hundred forty-six".