1636921054 has 8 divisors (see below), whose sum is σ = 2457583128. Its totient is φ = 817726680.

The previous prime is 1636921049. The next prime is 1636921057. The reversal of 1636921054 is 4501296361.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1636921057) 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, 364132 + ... + 368599.

It is an arithmetic number, because the mean of its divisors is an integer number (307197891).

Almost surely, 2^1636921054 is an apocalyptic number.

1636921054 is a deficient number, since it is larger than the sum of its proper divisors (820662074).

1636921054 is a wasteful number, since it uses less digits than its factorization.

1636921054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733850.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 1636921054 is about 40458.8810275321. The cubic root of 1636921054 is about 1178.5352537916.

The spelling of 1636921054 in words is "one billion, six hundred thirty-six million, nine hundred twenty-one thousand, fifty-four".