15537466442 has 4 divisors (see below), whose sum is σ = 23306199666. Its totient is φ = 7768733220.

The previous prime is 15537466403. The next prime is 15537466463. The reversal of 15537466442 is 24466473551.

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

It can be written as a sum of positive squares in only one way, i.e., 12541984081 + 2995482361 = 111991^2 + 54731^2 .

It is a super-2 number, since 2×15537466442² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3884366609 + ... + 3884366612.

Almost surely, 2^15537466442 is an apocalyptic number.

15537466442 is a deficient number, since it is larger than the sum of its proper divisors (7768733224).

15537466442 is an equidigital number, since it uses as much as digits as its factorization.

15537466442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7768733223.

The product of its digits is 2419200, while the sum is 47.

The spelling of 15537466442 in words is "fifteen billion, five hundred thirty-seven million, four hundred sixty-six thousand, four hundred forty-two".