127390815642 has 32 divisors (see below), whose sum is σ = 260273233152. Its totient is φ = 41548829504.

The previous prime is 127390815589. The next prime is 127390815659. The reversal of 127390815642 is 246518093721.

It is a junction number, because it is equal to n+sod(n) for n = 127390815591 and 127390815600.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1011268 + ... + 1130240.

It is an arithmetic number, because the mean of its divisors is an integer number (8133538536).

It is a 1-persistent number, because it is pandigital, but 2⋅127390815642 = 254781631284 is not.

Almost surely, 2^127390815642 is an apocalyptic number.

It is a pronic number, being equal to 356918×356919.

127390815642 is an abundant number, since it is smaller than the sum of its proper divisors (132882417510).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

127390815642 is a wasteful number, since it uses less digits than its factorization.

127390815642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122822.

The product of its (nonzero) digits is 725760, while the sum is 48.

The spelling of 127390815642 in words is "one hundred twenty-seven billion, three hundred ninety million, eight hundred fifteen thousand, six hundred forty-two".