728477148355538 has 8 divisors (see below), whose sum is σ = 1096162775286732. Its totient is φ = 363089556593296.

The previous prime is 728477148355529. The next prime is 728477148355543. The reversal of 728477148355538 is 835553841774827.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 721455141246889 + 7022007108649 = 26859917^2 + 2649907^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 574508791445 + ... + 574508792712.

Almost surely, 2^{728477148355538} is an apocalyptic number.

728477148355538 is a deficient number, since it is larger than the sum of its proper divisors (367685626931194).

728477148355538 is a wasteful number, since it uses less digits than its factorization.

728477148355538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1149017584476.

The product of its digits is 6322176000, while the sum is 77.

The spelling of 728477148355538 in words is "seven hundred twenty-eight trillion, four hundred seventy-seven billion, one hundred forty-eight million, three hundred fifty-five thousand, five hundred thirty-eight".