154557718061 has 2 divisors, whose sum is σ = 154557718062. Its totient is φ = 154557718060.

The previous prime is 154557717991. The next prime is 154557718067. The reversal of 154557718061 is 160817755451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 152876308036 + 1681410025 = 390994^2 + 41005^2 .

It is a cyclic number.

It is not a de Polignac number, because 154557718061 - 2²² = 154553523757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154557718067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77278859030 + 77278859031.

It is an arithmetic number, because the mean of its divisors is an integer number (77278859031).

Almost surely, 2^154557718061 is an apocalyptic number.

It is an amenable number.

154557718061 is a deficient number, since it is larger than the sum of its proper divisors (1).

154557718061 is an equidigital number, since it uses as much as digits as its factorization.

154557718061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1176000, while the sum is 50.

The spelling of 154557718061 in words is "one hundred fifty-four billion, five hundred fifty-seven million, seven hundred eighteen thousand, sixty-one".