155345564065 has 8 divisors (see below), whose sum is σ = 188064364968. Its totient is φ = 123176659200.

The previous prime is 155345564021. The next prime is 155345564071. The reversal of 155345564065 is 560465543551.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4887687744 + 150457876321 = 69912^2 + 387889^2 .

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

It is not a de Polignac number, because 155345564065 - 2¹⁷ = 155345432993 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137473386 + ... + 137474515.

It is an arithmetic number, because the mean of its divisors is an integer number (23508045621).

Almost surely, 2^155345564065 is an apocalyptic number.

It is an amenable number.

155345564065 is a deficient number, since it is larger than the sum of its proper divisors (32718800903).

155345564065 is a wasteful number, since it uses less digits than its factorization.

155345564065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274948019.

The product of its (nonzero) digits is 5400000, while the sum is 49.

The spelling of 155345564065 in words is "one hundred fifty-five billion, three hundred forty-five million, five hundred sixty-four thousand, sixty-five".