1612917780049 has 9 divisors (see below), whose sum is σ = 1627462508763. Its totient is φ = 1598501930592.

The previous prime is 1612917779929. The next prime is 1612917780059. The reversal of 1612917780049 is 9400877192161.

It is a happy number.

The square root of 1612917780049 is 1270007.

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., 28420902225 + 1584496877824 = 168585^2 + 1258768^2 .

It is not a de Polignac number, because 1612917780049 - 2⁹ = 1612917779537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1612917780059) 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, 143505172 + ... + 143516410.

Almost surely, 2^{1612917780049} is an apocalyptic number.

1612917780049 is the 1270007-th square number.

1612917780049 is the 635004-th centered octagonal number.

It is an amenable number.

1612917780049 is a deficient number, since it is larger than the sum of its proper divisors (14544728714).

1612917780049 is an frugal number, since it uses more digits than its factorization.

1612917780049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22704 (or 11352 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 55.

The spelling of 1612917780049 in words is "one trillion, six hundred twelve billion, nine hundred seventeen million, seven hundred eighty thousand, forty-nine".