15645045451 has 8 divisors (see below), whose sum is σ = 17880839424. Its totient is φ = 13409448360.

The previous prime is 15645045407. The next prime is 15645045457. The reversal of 15645045451 is 15454054651.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 15645045451 - 2²³ = 15636656843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15645045457) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 217266 + ... + 280168.

It is an arithmetic number, because the mean of its divisors is an integer number (2235104928).

Almost surely, 2^15645045451 is an apocalyptic number.

15645045451 is a deficient number, since it is larger than the sum of its proper divisors (2235793973).

15645045451 is an equidigital number, since it uses as much as digits as its factorization.

15645045451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98441.

The product of its (nonzero) digits is 240000, while the sum is 40.

The spelling of 15645045451 in words is "fifteen billion, six hundred forty-five million, forty-five thousand, four hundred fifty-one".