648376826461 has 24 divisors (see below), whose sum is σ = 802552057344. Its totient is φ = 512895839040.

The previous prime is 648376826443. The next prime is 648376826473. The reversal of 648376826461 is 164628673846.

It is a happy number.

It is not a de Polignac number, because 648376826461 - 2²¹ = 648374729309 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 648376826461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648376866461) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5964051 + ... + 6071791.

It is an arithmetic number, because the mean of its divisors is an integer number (33439669056).

Almost surely, 2^648376826461 is an apocalyptic number.

It is an amenable number.

648376826461 is a deficient number, since it is larger than the sum of its proper divisors (154175230883).

648376826461 is a wasteful number, since it uses less digits than its factorization.

648376826461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112861 (or 112848 counting only the distinct ones).

The product of its digits is 55738368, while the sum is 61.

The spelling of 648376826461 in words is "six hundred forty-eight billion, three hundred seventy-six million, eight hundred twenty-six thousand, four hundred sixty-one".