636490704478 has 32 divisors (see below), whose sum is σ = 1022865897600. Its totient is φ = 296139895776.

The previous prime is 636490704433. The next prime is 636490704527. The reversal of 636490704478 is 874407094636.

636490704478 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2602525 + ... + 2836567.

It is an arithmetic number, because the mean of its divisors is an integer number (31964559300).

Almost surely, 2^636490704478 is an apocalyptic number.

636490704478 is a deficient number, since it is larger than the sum of its proper divisors (386375193122).

636490704478 is a wasteful number, since it uses less digits than its factorization.

636490704478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235336.

The product of its (nonzero) digits is 24385536, while the sum is 58.

The spelling of 636490704478 in words is "six hundred thirty-six billion, four hundred ninety million, seven hundred four thousand, four hundred seventy-eight".