42721420036 has 48 divisors (see below), whose sum is σ = 80302353264. Its totient is φ = 19814547456.

The previous prime is 42721420033. The next prime is 42721420039. The reversal of 42721420036 is 63002412724.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (42721420033) and next prime (42721420039).

It can be written as a sum of positive squares in 8 ways, for example, as 7147687936 + 35573732100 = 84544^2 + 188610^2 .

It is not an unprimeable number, because it can be changed into a prime (42721420031) 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, 10486896 + ... + 10490968.

It is an arithmetic number, because the mean of its divisors is an integer number (1672965693).

Almost surely, 2^42721420036 is an apocalyptic number.

It is an amenable number.

42721420036 is a deficient number, since it is larger than the sum of its proper divisors (37580933228).

42721420036 is a wasteful number, since it uses less digits than its factorization.

42721420036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6280 (or 6278 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 31.

The spelling of 42721420036 in words is "forty-two billion, seven hundred twenty-one million, four hundred twenty thousand, thirty-six".