42778997546 has 8 divisors (see below), whose sum is σ = 64297092000. Its totient is φ = 21346633548.

The previous prime is 42778997543. The next prime is 42778997561. The reversal of 42778997546 is 64579987724.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (42778997543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21431366 + ... + 21433361.

It is an arithmetic number, because the mean of its divisors is an integer number (8037136500).

Almost surely, 2^42778997546 is an apocalyptic number.

42778997546 is a deficient number, since it is larger than the sum of its proper divisors (21518094454).

42778997546 is a wasteful number, since it uses less digits than its factorization.

42778997546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42865228.

The product of its digits is 213373440, while the sum is 68.

The spelling of 42778997546 in words is "forty-two billion, seven hundred seventy-eight million, nine hundred ninety-seven thousand, five hundred forty-six".