154321017085 has 4 divisors (see below), whose sum is σ = 185185220508. Its totient is φ = 123456813664.

The previous prime is 154321017083. The next prime is 154321017101. The reversal of 154321017085 is 580710123451.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 580710123451 = 23 ⋅25248266237.

It can be written as a sum of positive squares in 2 ways, for example, as 38205002521 + 116116014564 = 195461^2 + 340758^2 .

It is a cyclic number.

It is not a de Polignac number, because 154321017085 - 2¹ = 154321017083 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 (154321017083) 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, 15432101704 + ... + 15432101713.

It is an arithmetic number, because the mean of its divisors is an integer number (46296305127).

Almost surely, 2^154321017085 is an apocalyptic number.

It is an amenable number.

154321017085 is a deficient number, since it is larger than the sum of its proper divisors (30864203423).

154321017085 is an equidigital number, since it uses as much as digits as its factorization.

154321017085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30864203422.

The product of its (nonzero) digits is 33600, while the sum is 37.

The spelling of 154321017085 in words is "one hundred fifty-four billion, three hundred twenty-one million, seventeen thousand, eighty-five".