40017312763657 has 4 divisors (see below), whose sum is σ = 40224656353300. Its totient is φ = 39809969174016.

The previous prime is 40017312763619. The next prime is 40017312763663. The reversal of 40017312763657 is 75636721371004.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29490590914576 + 10526721849081 = 5430524^2 + 3244491^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40017312763657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40017312793657) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103671794532 + ... + 103671794917.

It is an arithmetic number, because the mean of its divisors is an integer number (10056164088325).

Almost surely, 2^{40017312763657} is an apocalyptic number.

It is an amenable number.

40017312763657 is a deficient number, since it is larger than the sum of its proper divisors (207343589643).

40017312763657 is a wasteful number, since it uses less digits than its factorization.

40017312763657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207343589642.

The product of its (nonzero) digits is 4445280, while the sum is 52.

The spelling of 40017312763657 in words is "forty trillion, seventeen billion, three hundred twelve million, seven hundred sixty-three thousand, six hundred fifty-seven".