42031252646 has 4 divisors (see below), whose sum is σ = 63046878972. Its totient is φ = 21015626322.

The previous prime is 42031252621. The next prime is 42031252661. The reversal of 42031252646 is 64625213024.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10507813160 + ... + 10507813163.

It is an arithmetic number, because the mean of its divisors is an integer number (15761719743).

Almost surely, 2^42031252646 is an apocalyptic number.

42031252646 is a deficient number, since it is larger than the sum of its proper divisors (21015626326).

42031252646 is a wasteful number, since it uses less digits than its factorization.

42031252646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21015626325.

The product of its (nonzero) digits is 69120, while the sum is 35.

The spelling of 42031252646 in words is "forty-two billion, thirty-one million, two hundred fifty-two thousand, six hundred forty-six".