240040420651 has 2 divisors, whose sum is σ = 240040420652. Its totient is φ = 240040420650.

The previous prime is 240040420603. The next prime is 240040420691. The reversal of 240040420651 is 156024040042.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 240040420651 - 2¹⁵ = 240040387883 is a prime.

It is not a weakly prime, because it can be changed into another prime (240040420601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120020210325 + 120020210326.

It is an arithmetic number, because the mean of its divisors is an integer number (120020210326).

Almost surely, 2^240040420651 is an apocalyptic number.

240040420651 is a deficient number, since it is larger than the sum of its proper divisors (1).

240040420651 is an equidigital number, since it uses as much as digits as its factorization.

240040420651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7680, while the sum is 28.

Adding to 240040420651 its reverse (156024040042), we get a palindrome (396064460693).

The spelling of 240040420651 in words is "two hundred forty billion, forty million, four hundred twenty thousand, six hundred fifty-one".