42421550078 has 16 divisors (see below), whose sum is σ = 67196787840. Its totient is φ = 20029800600.

The previous prime is 42421550077. The next prime is 42421550147. The reversal of 42421550078 is 87005512424.

It is a super-2 number, since 2×42421550078² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42421550071) 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, 1782968 + ... + 1806603.

It is an arithmetic number, because the mean of its divisors is an integer number (4199799240).

Almost surely, 2^42421550078 is an apocalyptic number.

42421550078 is a deficient number, since it is larger than the sum of its proper divisors (24775237762).

42421550078 is a wasteful number, since it uses less digits than its factorization.

42421550078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3589903.

The product of its (nonzero) digits is 89600, while the sum is 38.

The spelling of 42421550078 in words is "forty-two billion, four hundred twenty-one million, five hundred fifty thousand, seventy-eight".