648206155 has 8 divisors (see below), whose sum is σ = 791031600. Its totient is φ = 509775456.

The previous prime is 648206149. The next prime is 648206159. The reversal of 648206155 is 551602846.

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

It is a cyclic number.

It is not a de Polignac number, because 648206155 - 2⁹ = 648205643 is a prime.

It is not an unprimeable number, because it can be changed into a prime (648206159) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1098360 + ... + 1098949.

It is an arithmetic number, because the mean of its divisors is an integer number (98878950).

Almost surely, 2^648206155 is an apocalyptic number.

648206155 is a deficient number, since it is larger than the sum of its proper divisors (142825445).

648206155 is a wasteful number, since it uses less digits than its factorization.

648206155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2197373.

The product of its (nonzero) digits is 57600, while the sum is 37.

The square root of 648206155 is about 25459.8930673324. The cubic root of 648206155 is about 865.4415000348.

It can be divided in two parts, 6482061 and 55, that added together give a square (6482116 = 2546²).

The spelling of 648206155 in words is "six hundred forty-eight million, two hundred six thousand, one hundred fifty-five".