5651280394 has 4 divisors (see below), whose sum is σ = 8476920594. Its totient is φ = 2825640196.

The previous prime is 5651280391. The next prime is 5651280407. The reversal of 5651280394 is 4930821565.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 5567099769 + 84180625 = 74613^2 + 9175^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 5651280394.

It is not an unprimeable number, because it can be changed into a prime (5651280391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1412820097 + ... + 1412820100.

Almost surely, 2^5651280394 is an apocalyptic number.

5651280394 is a deficient number, since it is larger than the sum of its proper divisors (2825640200).

5651280394 is a wasteful number, since it uses less digits than its factorization.

5651280394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2825640199.

The product of its (nonzero) digits is 259200, while the sum is 43.

The square root of 5651280394 is about 75174.9984635850. The cubic root of 5651280394 is about 1781.2120258095.

The spelling of 5651280394 in words is "five billion, six hundred fifty-one million, two hundred eighty thousand, three hundred ninety-four".