1615677414649 has 27 divisors (see below), whose sum is σ = 1687710663567. Its totient is φ = 1546665962400.

The previous prime is 1615677414647. The next prime is 1615677414667. The reversal of 1615677414649 is 9464147765161.

The square root of 1615677414649 is 1271093.

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., 10307325625 + 1605370089024 = 101525^2 + 1267032^2 .

It is not a de Polignac number, because 1615677414649 - 2¹ = 1615677414647 is a prime.

It is a super-2 number, since 2×1615677414649² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1615677414647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 5161908517 + ... + 5161908829.

Almost surely, 2^{1615677414649} is an apocalyptic number.

1615677414649 is the 1271093-rd square number.

1615677414649 is the 635547-th centered octagonal number.

It is an amenable number.

1615677414649 is a deficient number, since it is larger than the sum of its proper divisors (72033248918).

1615677414649 is an frugal number, since it uses more digits than its factorization.

1615677414649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 950 (or 475 counting only the distinct ones).

The product of its digits is 30481920, while the sum is 61.

The spelling of 1615677414649 in words is "one trillion, six hundred fifteen billion, six hundred seventy-seven million, four hundred fourteen thousand, six hundred forty-nine".