648626948386 has 4 divisors (see below), whose sum is σ = 972940422582. Its totient is φ = 324313474192.

The previous prime is 648626948371. The next prime is 648626948467. The reversal of 648626948386 is 683849626846.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 509180717761 + 139446230625 = 713569^2 + 373425^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 162156737095 + ... + 162156737098.

Almost surely, 2^648626948386 is an apocalyptic number.

648626948386 is a deficient number, since it is larger than the sum of its proper divisors (324313474196).

648626948386 is a wasteful number, since it uses less digits than its factorization.

648626948386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324313474195.

The product of its digits is 573308928, while the sum is 70.

The spelling of 648626948386 in words is "six hundred forty-eight billion, six hundred twenty-six million, nine hundred forty-eight thousand, three hundred eighty-six".