42697042640 has 160 divisors (see below), whose sum is σ = 116282200320. Its totient is φ = 14274957312.

The previous prime is 42697042639. The next prime is 42697042709. The reversal of 42697042640 is 4624079624.

It is a junction number, because it is equal to n+sod(n) for n = 42697042591 and 42697042600.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20635526 + ... + 20637594.

It is an arithmetic number, because the mean of its divisors is an integer number (726763752).

Almost surely, 2^42697042640 is an apocalyptic number.

42697042640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42697042640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58141100160).

42697042640 is an abundant number, since it is smaller than the sum of its proper divisors (73585157680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42697042640 is a wasteful number, since it uses less digits than its factorization.

42697042640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2989 (or 2983 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 44.

The spelling of 42697042640 in words is "forty-two billion, six hundred ninety-seven million, forty-two thousand, six hundred forty".