648998562438 has 32 divisors (see below), whose sum is σ = 1488742225920. Its totient is φ = 209354374440.

The previous prime is 648998562403. The next prime is 648998562473. The reversal of 648998562438 is 834265899846.

It is a happy number.

648998562438 is a `hidden beast` number, since 6 + 48 + 9 + 98 + 5 + 62 + 438 = 666.

It is an interprime number because it is at equal distance from previous prime (648998562403) and next prime (648998562473).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 193844970 + ... + 193848317.

It is an arithmetic number, because the mean of its divisors is an integer number (46523194560).

Almost surely, 2^648998562438 is an apocalyptic number.

648998562438 is an abundant number, since it is smaller than the sum of its proper divisors (839743663482).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

648998562438 is a wasteful number, since it uses less digits than its factorization.

648998562438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387693329 (or 387693323 counting only the distinct ones).

The product of its digits is 716636160, while the sum is 72.

The spelling of 648998562438 in words is "six hundred forty-eight billion, nine hundred ninety-eight million, five hundred sixty-two thousand, four hundred thirty-eight".