15450479680 has 56 divisors (see below), whose sum is σ = 37129074840. Its totient is φ = 6123479040.

The previous prime is 15450479659. The next prime is 15450479687. The reversal of 15450479680 is 8697405451.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 42719296 + 15407760384 = 6536^2 + 124128^2 .

It is not an unprimeable number, because it can be changed into a prime (15450479687) 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, 186601 + ... + 256360.

Almost surely, 2^15450479680 is an apocalyptic number.

15450479680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15450479680 is an abundant number, since it is smaller than the sum of its proper divisors (21678595160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15450479680 is a wasteful number, since it uses less digits than its factorization.

15450479680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443087 (or 443077 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 49.

The spelling of 15450479680 in words is "fifteen billion, four hundred fifty million, four hundred seventy-nine thousand, six hundred eighty".