155612052556409 has 8 divisors (see below), whose sum is σ = 164856084364800. Its totient is φ = 146378063154496.

The previous prime is 155612052556391. The next prime is 155612052556427. The reversal of 155612052556409 is 904655250216551.

It is an interprime number because it is at equal distance from previous prime (155612052556391) and next prime (155612052556427).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155612052556409 is a prime.

It is a super-2 number, since 2×155612052556409² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155612052556459) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2510569709 + ... + 2510631690.

It is an arithmetic number, because the mean of its divisors is an integer number (20607010545600).

Almost surely, 2^{155612052556409} is an apocalyptic number.

It is an amenable number.

155612052556409 is a deficient number, since it is larger than the sum of its proper divisors (9244031808391).

155612052556409 is a wasteful number, since it uses less digits than its factorization.

155612052556409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5021203239.

The product of its (nonzero) digits is 16200000, while the sum is 56.

The spelling of 155612052556409 in words is "one hundred fifty-five trillion, six hundred twelve billion, fifty-two million, five hundred fifty-six thousand, four hundred nine".