1161635520242 has 4 divisors (see below), whose sum is σ = 1742453280366. Its totient is φ = 580817760120.

The previous prime is 1161635520161. The next prime is 1161635520307. The reversal of 1161635520242 is 2420255361611.

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

It can be written as a sum of positive squares in only one way, i.e., 947330409481 + 214305110761 = 973309^2 + 462931^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1161635520196 and 1161635520205.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 290408880059 + ... + 290408880062.

Almost surely, 2^{1161635520242} is an apocalyptic number.

1161635520242 is a deficient number, since it is larger than the sum of its proper divisors (580817760124).

1161635520242 is an equidigital number, since it uses as much as digits as its factorization.

1161635520242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580817760123.

The product of its (nonzero) digits is 86400, while the sum is 38.

The spelling of 1161635520242 in words is "one trillion, one hundred sixty-one billion, six hundred thirty-five million, five hundred twenty thousand, two hundred forty-two".