40177706421 has 4 divisors (see below), whose sum is σ = 53570275232. Its totient is φ = 26785137612.

The previous prime is 40177706351. The next prime is 40177706431. The reversal of 40177706421 is 12460777104.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 40177706421 - 2¹⁰ = 40177705397 is a prime.

It is a super-2 number, since 2×40177706421² (a number of 22 digits) contains 22 as substring.

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 40177706421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40177706431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6696284401 + ... + 6696284406.

It is an arithmetic number, because the mean of its divisors is an integer number (13392568808).

Almost surely, 2^40177706421 is an apocalyptic number.

It is an amenable number.

40177706421 is a deficient number, since it is larger than the sum of its proper divisors (13392568811).

40177706421 is a wasteful number, since it uses less digits than its factorization.

40177706421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13392568810.

The product of its (nonzero) digits is 65856, while the sum is 39.

The spelling of 40177706421 in words is "forty billion, one hundred seventy-seven million, seven hundred six thousand, four hundred twenty-one".