7561297778162 has 8 divisors (see below), whose sum is σ = 11358126336492. Its totient is φ = 3775255666000.

The previous prime is 7561297778149. The next prime is 7561297778231. The reversal of 7561297778162 is 2618777921657.

It can be written as a sum of positive squares in 2 ways, for example, as 6550727994721 + 1010569783441 = 2559439^2 + 1005271^2 .

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

It is a super-4 number, since 4×7561297778162⁴ (a number of 53 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7561297778092 and 7561297778101.

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, 2696609789 + ... + 2696612592.

Almost surely, 2^{7561297778162} is an apocalyptic number.

7561297778162 is a deficient number, since it is larger than the sum of its proper divisors (3796828558330).

7561297778162 is a wasteful number, since it uses less digits than its factorization.

7561297778162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5393223084.

The product of its digits is 124467840, while the sum is 68.

The spelling of 7561297778162 in words is "seven trillion, five hundred sixty-one billion, two hundred ninety-seven million, seven hundred seventy-eight thousand, one hundred sixty-two".