40007073649 has 2 divisors, whose sum is σ = 40007073650. Its totient is φ = 40007073648.

The previous prime is 40007073599. The next prime is 40007073737. The reversal of 40007073649 is 94637070004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37801080625 + 2205993024 = 194425^2 + 46968^2 .

It is a cyclic number.

It is not a de Polignac number, because 40007073649 - 2³³ = 31417139057 is a prime.

It is not a weakly prime, because it can be changed into another prime (40007073349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20003536824 + 20003536825.

It is an arithmetic number, because the mean of its divisors is an integer number (20003536825).

Almost surely, 2^40007073649 is an apocalyptic number.

It is an amenable number.

40007073649 is a deficient number, since it is larger than the sum of its proper divisors (1).

40007073649 is an equidigital number, since it uses as much as digits as its factorization.

40007073649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 127008, while the sum is 40.

The spelling of 40007073649 in words is "forty billion, seven million, seventy-three thousand, six hundred forty-nine".