648400254273 has 12 divisors (see below), whose sum is σ = 936585187668. Its totient is φ = 432263585760.

The previous prime is 648400254217. The next prime is 648400254349. The reversal of 648400254273 is 372452004846.

It is a happy number.

648400254273 is a `hidden beast` number, since 64 + 8 + 40 + 0 + 2 + 542 + 7 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 614800264464 + 33599989809 = 784092^2 + 183303^2 .

It is not a de Polignac number, because 648400254273 - 2¹⁴ = 648400237889 is a prime.

It is a super-3 number, since 3×648400254273³ (a number of 36 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (648400254673) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1956511 + ... + 2263787.

It is an arithmetic number, because the mean of its divisors is an integer number (78048765639).

Almost surely, 2^648400254273 is an apocalyptic number.

It is an amenable number.

648400254273 is a deficient number, since it is larger than the sum of its proper divisors (288184933395).

648400254273 is a wasteful number, since it uses less digits than its factorization.

648400254273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541744 (or 541741 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 45.

The spelling of 648400254273 in words is "six hundred forty-eight billion, four hundred million, two hundred fifty-four thousand, two hundred seventy-three".