649553697998 has 8 divisors (see below), whose sum is σ = 975591002808. Its totient is φ = 324356697064.

The previous prime is 649553697997. The next prime is 649553698081. The reversal of 649553697998 is 899796355946.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649553697997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210074036 + ... + 210077127.

It is an arithmetic number, because the mean of its divisors is an integer number (121948875351).

Almost surely, 2^649553697998 is an apocalyptic number.

649553697998 is a deficient number, since it is larger than the sum of its proper divisors (326037304810).

649553697998 is a wasteful number, since it uses less digits than its factorization.

649553697998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420151938.

The product of its digits is 3968092800, while the sum is 80.

The spelling of 649553697998 in words is "six hundred forty-nine billion, five hundred fifty-three million, six hundred ninety-seven thousand, nine hundred ninety-eight".