1616157245 has 4 divisors (see below), whose sum is σ = 1939388700. Its totient is φ = 1292925792.

The previous prime is 1616157239. The next prime is 1616157247. The reversal of 1616157245 is 5427516161.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 882505849 + 733651396 = 29707^2 + 27086^2 .

It is a cyclic number.

It is not a de Polignac number, because 1616157245 - 2¹⁴ = 1616140861 is a prime.

It is a super-2 number, since 2×1616157245² = 5223928481131980050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1616157199 and 1616157208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1616157247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161615720 + ... + 161615729.

It is an arithmetic number, because the mean of its divisors is an integer number (484847175).

Almost surely, 2^1616157245 is an apocalyptic number.

It is an amenable number.

1616157245 is a deficient number, since it is larger than the sum of its proper divisors (323231455).

1616157245 is an equidigital number, since it uses as much as digits as its factorization.

1616157245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323231454.

The product of its digits is 50400, while the sum is 38.

The square root of 1616157245 is about 40201.4582446956. The cubic root of 1616157245 is about 1173.5309227241.

The spelling of 1616157245 in words is "one billion, six hundred sixteen million, one hundred fifty-seven thousand, two hundred forty-five".