16351648537 has 6 divisors (see below), whose sum is σ = 19021305498. Its totient is φ = 14015698704.

The previous prime is 16351648531. The next prime is 16351648541. The reversal of 16351648537 is 73584615361.

It can be written as a sum of positive squares in only one way, i.e., 16253955081 + 97693456 = 127491^2 + 9884^2 .

It is not a de Polignac number, because 16351648537 - 2¹⁵ = 16351615769 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49), and also a Moran number because the ratio is a prime number: 333707113 = 16351648537 / (1 + 6 + 3 + 5 + 1 + 6 + 4 + 8 + 5 + 3 + 7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16351648531) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 166853508 + ... + 166853605.

It is an arithmetic number, because the mean of its divisors is an integer number (3170217583).

Almost surely, 2^16351648537 is an apocalyptic number.

It is an amenable number.

16351648537 is a deficient number, since it is larger than the sum of its proper divisors (2669656961).

16351648537 is an equidigital number, since it uses as much as digits as its factorization.

16351648537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333707127 (or 333707120 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 49.

The spelling of 16351648537 in words is "sixteen billion, three hundred fifty-one million, six hundred forty-eight thousand, five hundred thirty-seven".