42378009765 has 32 divisors (see below), whose sum is σ = 83452083456. Its totient is φ = 17882588160.

The previous prime is 42378009761. The next prime is 42378009769. The reversal of 42378009765 is 56790087324.

It is an interprime number because it is at equal distance from previous prime (42378009761) and next prime (42378009769).

It is not a de Polignac number, because 42378009765 - 2² = 42378009761 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42378009761) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15521716 + ... + 15524445.

It is an arithmetic number, because the mean of its divisors is an integer number (2607877608).

Almost surely, 2^42378009765 is an apocalyptic number.

It is an amenable number.

42378009765 is a deficient number, since it is larger than the sum of its proper divisors (41074073691).

42378009765 is a wasteful number, since it uses less digits than its factorization.

42378009765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31046189.

The product of its (nonzero) digits is 2540160, while the sum is 51.

The spelling of 42378009765 in words is "forty-two billion, three hundred seventy-eight million, nine thousand, seven hundred sixty-five".