154205142061 has 4 divisors (see below), whose sum is σ = 154207190332. Its totient is φ = 154203093792.

The previous prime is 154205142031. The next prime is 154205142073. The reversal of 154205142061 is 160241502451.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2253305961 + 151951836100 = 47469^2 + 389810^2 .

It is a cyclic number.

It is not a de Polignac number, because 154205142061 - 2³¹ = 152057658413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154205142031) 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 in 3 ways as a sum of consecutive naturals, for example, 906720 + ... + 1063273.

It is an arithmetic number, because the mean of its divisors is an integer number (38551797583).

Almost surely, 2^154205142061 is an apocalyptic number.

It is an amenable number.

154205142061 is a deficient number, since it is larger than the sum of its proper divisors (2048271).

154205142061 is an equidigital number, since it uses as much as digits as its factorization.

154205142061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2048270.

The product of its (nonzero) digits is 9600, while the sum is 31.

The spelling of 154205142061 in words is "one hundred fifty-four billion, two hundred five million, one hundred forty-two thousand, sixty-one".