1355642612061 has 4 divisors (see below), whose sum is σ = 1807523482752. Its totient is φ = 903761741372.

The previous prime is 1355642612047. The next prime is 1355642612081. The reversal of 1355642612061 is 1602162465531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1355642612061 - 2¹⁵ = 1355642579293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1355642612011) 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, 225940435341 + ... + 225940435346.

It is an arithmetic number, because the mean of its divisors is an integer number (451880870688).

Almost surely, 2^{1355642612061} is an apocalyptic number.

It is an amenable number.

1355642612061 is a deficient number, since it is larger than the sum of its proper divisors (451880870691).

1355642612061 is an equidigital number, since it uses as much as digits as its factorization.

1355642612061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451880870690.

The product of its (nonzero) digits is 259200, while the sum is 42.

The spelling of 1355642612061 in words is "one trillion, three hundred fifty-five billion, six hundred forty-two million, six hundred twelve thousand, sixty-one".