155215446061 has 4 divisors (see below), whose sum is σ = 167155095772. Its totient is φ = 143275796352.

The previous prime is 155215446041. The next prime is 155215446073. The reversal of 155215446061 is 160644512551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 160644512551 = 311 ⋅516541841.

It can be written as a sum of positive squares in 2 ways, for example, as 20952562500 + 134262883561 = 144750^2 + 366419^2 .

It is not a de Polignac number, because 155215446061 - 2⁹ = 155215445549 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 (155215446031) 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, 5969824836 + ... + 5969824861.

It is an arithmetic number, because the mean of its divisors is an integer number (41788773943).

Almost surely, 2^155215446061 is an apocalyptic number.

It is an amenable number.

155215446061 is a deficient number, since it is larger than the sum of its proper divisors (11939649711).

155215446061 is a wasteful number, since it uses less digits than its factorization.

155215446061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11939649710.

The product of its (nonzero) digits is 144000, while the sum is 40.

The spelling of 155215446061 in words is "one hundred fifty-five billion, two hundred fifteen million, four hundred forty-six thousand, sixty-one".