648842354 has 4 divisors (see below), whose sum is σ = 973263534. Its totient is φ = 324421176.

The previous prime is 648842353. The next prime is 648842357. The reversal of 648842354 is 453248846.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 453248846 = 2 ⋅226624423.

It can be written as a sum of positive squares in only one way, i.e., 534673129 + 114169225 = 23123^2 + 10685^2 .

It is a super-2 number, since 2×648842354² = 841992800688522632, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (648842353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 162210587 + ... + 162210590.

Almost surely, 2^648842354 is an apocalyptic number.

648842354 is a deficient number, since it is larger than the sum of its proper divisors (324421180).

648842354 is a wasteful number, since it uses less digits than its factorization.

648842354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324421179.

The product of its digits is 737280, while the sum is 44.

The square root of 648842354 is about 25472.3841444023. The cubic root of 648842354 is about 865.7245442379.

The spelling of 648842354 in words is "six hundred forty-eight million, eight hundred forty-two thousand, three hundred fifty-four".