120664251553 has 4 divisors (see below), whose sum is σ = 120687114240. Its totient is φ = 120641388868.

The previous prime is 120664251551. The next prime is 120664251557. The reversal of 120664251553 is 355152466021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 355152466021 = 5441 ⋅65273381.

It is a cyclic number.

It is not a de Polignac number, because 120664251553 - 2¹ = 120664251551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120664251551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11423425 + ... + 11433982.

It is an arithmetic number, because the mean of its divisors is an integer number (30171778560).

Almost surely, 2^120664251553 is an apocalyptic number.

It is an amenable number.

120664251553 is a deficient number, since it is larger than the sum of its proper divisors (22862687).

120664251553 is an equidigital number, since it uses as much as digits as its factorization.

120664251553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22862686.

The product of its (nonzero) digits is 216000, while the sum is 40.

The spelling of 120664251553 in words is "one hundred twenty billion, six hundred sixty-four million, two hundred fifty-one thousand, five hundred fifty-three".