120505151865 has 64 divisors (see below), whose sum is σ = 236510516736. Its totient is φ = 51137298432.

The previous prime is 120505151839. The next prime is 120505151891. The reversal of 120505151865 is 568151505021.

It is an interprime number because it is at equal distance from previous prime (120505151839) and next prime (120505151891).

It is not a de Polignac number, because 120505151865 - 2⁸ = 120505151609 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 332092 + ... + 592701.

It is an arithmetic number, because the mean of its divisors is an integer number (3695476824).

Almost surely, 2^120505151865 is an apocalyptic number.

120505151865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

120505151865 is a deficient number, since it is larger than the sum of its proper divisors (116005364871).

120505151865 is a wasteful number, since it uses less digits than its factorization.

120505151865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 924898.

The product of its (nonzero) digits is 60000, while the sum is 39.

Adding to 120505151865 its reverse (568151505021), we get a palindrome (688656656886).

The spelling of 120505151865 in words is "one hundred twenty billion, five hundred five million, one hundred fifty-one thousand, eight hundred sixty-five".