1015473397849 has 9 divisors (see below), whose sum is σ = 1017722527551. Its totient is φ = 1013229234360.

The previous prime is 1015473397847. The next prime is 1015473397937. The reversal of 1015473397849 is 9487933745101.

The square root of 1015473397849 is 1007707.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 203549857225 + 811923540624 = 451165^2 + 901068^2 .

It is not a de Polignac number, because 1015473397849 - 2¹ = 1015473397847 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1015473397847) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 635862319 + ... + 635863915.

It is an arithmetic number, because the mean of its divisors is an integer number (113080280839).

Almost surely, 2^{1015473397849} is an apocalyptic number.

1015473397849 is the 1007707-th square number.

1015473397849 is the 503854-th centered octagonal number.

It is an amenable number.

1015473397849 is a deficient number, since it is larger than the sum of its proper divisors (2249129702).

1015473397849 is an frugal number, since it uses more digits than its factorization.

1015473397849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4456 (or 2228 counting only the distinct ones).

The product of its (nonzero) digits is 22861440, while the sum is 61.

The spelling of 1015473397849 in words is "one trillion, fifteen billion, four hundred seventy-three million, three hundred ninety-seven thousand, eight hundred forty-nine".