40728821745 has 16 divisors (see below), whose sum is σ = 66058803072. Its totient is φ = 21424475520.

The previous prime is 40728821737. The next prime is 40728821759. The reversal of 40728821745 is 54712882704.

It is not a de Polignac number, because 40728821745 - 2³ = 40728821737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40728821694 and 40728821703.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18596541 + ... + 18598730.

It is an arithmetic number, because the mean of its divisors is an integer number (4128675192).

Almost surely, 2^40728821745 is an apocalyptic number.

It is an amenable number.

40728821745 is a deficient number, since it is larger than the sum of its proper divisors (25329981327).

40728821745 is a wasteful number, since it uses less digits than its factorization.

40728821745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37195352.

The product of its (nonzero) digits is 1003520, while the sum is 48.

The spelling of 40728821745 in words is "forty billion, seven hundred twenty-eight million, eight hundred twenty-one thousand, seven hundred forty-five".