3656212531061 has 2 divisors, whose sum is σ = 3656212531062. Its totient is φ = 3656212531060.

The previous prime is 3656212531043. The next prime is 3656212531087. The reversal of 3656212531061 is 1601352126563.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2080823560036 + 1575388971025 = 1442506^2 + 1255145^2 .

It is a cyclic number.

It is not a de Polignac number, because 3656212531061 - 2¹⁴ = 3656212514677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3656215531061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1828106265530 + 1828106265531.

It is an arithmetic number, because the mean of its divisors is an integer number (1828106265531).

Almost surely, 2^{3656212531061} is an apocalyptic number.

It is an amenable number.

3656212531061 is a deficient number, since it is larger than the sum of its proper divisors (1).

3656212531061 is an equidigital number, since it uses as much as digits as its factorization.

3656212531061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 194400, while the sum is 41.

The spelling of 3656212531061 in words is "three trillion, six hundred fifty-six billion, two hundred twelve million, five hundred thirty-one thousand, sixty-one".