400136774477 has 4 divisors (see below), whose sum is σ = 436512844896. Its totient is φ = 363760704060.

The previous prime is 400136774417. The next prime is 400136774501. The reversal of 400136774477 is 774477631004.

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 a cyclic number.

It is not a de Polignac number, because 400136774477 - 2⁶ = 400136774413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400136774417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18188035193 + ... + 18188035214.

It is an arithmetic number, because the mean of its divisors is an integer number (109128211224).

Almost surely, 2^400136774477 is an apocalyptic number.

It is an amenable number.

400136774477 is a deficient number, since it is larger than the sum of its proper divisors (36376070419).

400136774477 is a wasteful number, since it uses less digits than its factorization.

400136774477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36376070418.

The product of its (nonzero) digits is 2765952, while the sum is 50.

The spelling of 400136774477 in words is "four hundred billion, one hundred thirty-six million, seven hundred seventy-four thousand, four hundred seventy-seven".