648509026 has 32 divisors (see below), whose sum is σ = 1153105920. Its totient is φ = 270248400.

The previous prime is 648509021. The next prime is 648509033. The reversal of 648509026 is 620905846.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 648509026.

It is not an unprimeable number, because it can be changed into a prime (648509021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12066 + ... + 37981.

It is an arithmetic number, because the mean of its divisors is an integer number (36034560).

Almost surely, 2^648509026 is an apocalyptic number.

648509026 is a deficient number, since it is larger than the sum of its proper divisors (504596894).

648509026 is a wasteful number, since it uses less digits than its factorization.

648509026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50110.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 648509026 is about 25465.8403749022. The cubic root of 648509026 is about 865.5762700802.

The spelling of 648509026 in words is "six hundred forty-eight million, five hundred nine thousand, twenty-six".