42954163981 has 8 divisors (see below), whose sum is σ = 44838469440. Its totient is φ = 41071252992.

The previous prime is 42954163979. The next prime is 42954163997. The reversal of 42954163981 is 18936145924.

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

It is a cyclic number.

It is not a de Polignac number, because 42954163981 - 2¹ = 42954163979 is a prime.

It is a super-2 number, since 2×42954163981² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42954163181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 285415 + ... + 409108.

It is an arithmetic number, because the mean of its divisors is an integer number (5604808680).

Almost surely, 2^42954163981 is an apocalyptic number.

It is an amenable number.

42954163981 is a deficient number, since it is larger than the sum of its proper divisors (1884305459).

42954163981 is a wasteful number, since it uses less digits than its factorization.

42954163981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697235.

The product of its digits is 1866240, while the sum is 52.

The spelling of 42954163981 in words is "forty-two billion, nine hundred fifty-four million, one hundred sixty-three thousand, nine hundred eighty-one".