40749663758977 has 4 divisors (see below), whose sum is σ = 40749701965636. Its totient is φ = 40749625552320.

The previous prime is 40749663758939. The next prime is 40749663759001. The reversal of 40749663758977 is 77985736694704.

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 31837761110016 + 8911902648961 = 5642496^2 + 2985281^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40749663758977 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40749663758977.

It is not an unprimeable number, because it can be changed into a prime (40749663258977) 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, 17456148 + ... + 19652389.

It is an arithmetic number, because the mean of its divisors is an integer number (10187425491409).

Almost surely, 2^{40749663758977} is an apocalyptic number.

It is an amenable number.

40749663758977 is a deficient number, since it is larger than the sum of its proper divisors (38206659).

40749663758977 is a wasteful number, since it uses less digits than its factorization.

40749663758977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38206658.

The product of its (nonzero) digits is 13442526720, while the sum is 82.

The spelling of 40749663758977 in words is "forty trillion, seven hundred forty-nine billion, six hundred sixty-three million, seven hundred fifty-eight thousand, nine hundred seventy-seven".