42240696981 has 16 divisors (see below), whose sum is σ = 64373028864. Its totient is φ = 24135196464.

The previous prime is 42240696959. The next prime is 42240697019. The reversal of 42240696981 is 18969604224.

It is not a de Polignac number, because 42240696981 - 2¹⁷ = 42240565909 is a prime.

It is a super-2 number, since 2×42240696981² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42240696931) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136720 + ... + 321206.

It is an arithmetic number, because the mean of its divisors is an integer number (4023314304).

Almost surely, 2^42240696981 is an apocalyptic number.

It is an amenable number.

42240696981 is a deficient number, since it is larger than the sum of its proper divisors (22132331883).

42240696981 is a wasteful number, since it uses less digits than its factorization.

42240696981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195400.

The product of its (nonzero) digits is 1492992, while the sum is 51.

The spelling of 42240696981 in words is "forty-two billion, two hundred forty million, six hundred ninety-six thousand, nine hundred eighty-one".