40157773709 has 2 divisors, whose sum is σ = 40157773710. Its totient is φ = 40157773708.

The previous prime is 40157773681. The next prime is 40157773723. The reversal of 40157773709 is 90737775104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36108360484 + 4049413225 = 190022^2 + 63635^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40157773709 is a prime.

It is a super-2 number, since 2×40157773709² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40157773739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20078886854 + 20078886855.

It is an arithmetic number, because the mean of its divisors is an integer number (20078886855).

Almost surely, 2^40157773709 is an apocalyptic number.

It is an amenable number.

40157773709 is a deficient number, since it is larger than the sum of its proper divisors (1).

40157773709 is an equidigital number, since it uses as much as digits as its factorization.

40157773709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296540, while the sum is 50.

The spelling of 40157773709 in words is "forty billion, one hundred fifty-seven million, seven hundred seventy-three thousand, seven hundred nine".