15450145621 has 4 divisors (see below), whose sum is σ = 16263311200. Its totient is φ = 14636980044.

The previous prime is 15450145609. The next prime is 15450145631. The reversal of 15450145621 is 12654105451.

15450145621 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 15450145621 - 2¹³ = 15450137429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15450145631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 406582761 + ... + 406582798.

It is an arithmetic number, because the mean of its divisors is an integer number (4065827800).

Almost surely, 2^15450145621 is an apocalyptic number.

It is an amenable number.

15450145621 is a deficient number, since it is larger than the sum of its proper divisors (813165579).

15450145621 is an equidigital number, since it uses as much as digits as its factorization.

15450145621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 813165578.

The product of its (nonzero) digits is 24000, while the sum is 34.

The spelling of 15450145621 in words is "fifteen billion, four hundred fifty million, one hundred forty-five thousand, six hundred twenty-one".