664131153551 has 4 divisors (see below), whose sum is σ = 664205541600. Its totient is φ = 664056765504.

The previous prime is 664131153523. The next prime is 664131153571. The reversal of 664131153551 is 155351131466.

664131153551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 664131153551 - 2³⁰ = 663057411727 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 664131153499 and 664131153508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664131153571) 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, 37180631 + ... + 37198488.

It is an arithmetic number, because the mean of its divisors is an integer number (166051385400).

Almost surely, 2^664131153551 is an apocalyptic number.

664131153551 is a deficient number, since it is larger than the sum of its proper divisors (74388049).

664131153551 is an equidigital number, since it uses as much as digits as its factorization.

664131153551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74388048.

The product of its digits is 162000, while the sum is 41.

The spelling of 664131153551 in words is "six hundred sixty-four billion, one hundred thirty-one million, one hundred fifty-three thousand, five hundred fifty-one".