648505677512 has 128 divisors (see below), whose sum is σ = 1551872424960. Its totient is φ = 246688485120.

The previous prime is 648505677511. The next prime is 648505677559. The reversal of 648505677512 is 215776505846.

It is a super-2 number, since 2×648505677512² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is not an unprimeable number, because it can be changed into a prime (648505677511) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 119802518 + ... + 119807930.

It is an arithmetic number, because the mean of its divisors is an integer number (12124003320).

Almost surely, 2^648505677512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 648505677512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (775936212480).

648505677512 is an abundant number, since it is smaller than the sum of its proper divisors (903366747448).

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

648505677512 is a wasteful number, since it uses less digits than its factorization.

648505677512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10003 (or 9999 counting only the distinct ones).

The product of its (nonzero) digits is 14112000, while the sum is 56.

The spelling of 648505677512 in words is "six hundred forty-eight billion, five hundred five million, six hundred seventy-seven thousand, five hundred twelve".