72042446745 has 48 divisors (see below), whose sum is σ = 136484255232. Its totient is φ = 34995939840.

The previous prime is 72042446743. The next prime is 72042446747. The reversal of 72042446745 is 54764424027.

It is an interprime number because it is at equal distance from previous prime (72042446743) and next prime (72042446747).

It is not a de Polignac number, because 72042446745 - 2¹ = 72042446743 is a prime.

It is a super-2 number, since 2×72042446745² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 72042446745.

It is not an unprimeable number, because it can be changed into a prime (72042446743) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 1495207 + ... + 1542636.

It is an arithmetic number, because the mean of its divisors is an integer number (2843421984).

Almost surely, 2^72042446745 is an apocalyptic number.

It is an amenable number.

72042446745 is a deficient number, since it is larger than the sum of its proper divisors (64441808487).

72042446745 is a wasteful number, since it uses less digits than its factorization.

72042446745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3037902 (or 3037899 counting only the distinct ones).

The product of its (nonzero) digits is 1505280, while the sum is 45.

The spelling of 72042446745 in words is "seventy-two billion, forty-two million, four hundred forty-six thousand, seven hundred forty-five".