155089700389 has 4 divisors (see below), whose sum is σ = 167019677356. Its totient is φ = 143159723424.

The previous prime is 155089700383. The next prime is 155089700393. The reversal of 155089700389 is 983007980551.

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 39210732289 + 115878968100 = 198017^2 + 340410^2 .

It is a cyclic number.

It is not a de Polignac number, because 155089700389 - 2⁷ = 155089700261 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 (155089700383) 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, 5964988464 + ... + 5964988489.

It is an arithmetic number, because the mean of its divisors is an integer number (41754919339).

Almost surely, 2^155089700389 is an apocalyptic number.

It is an amenable number.

155089700389 is a deficient number, since it is larger than the sum of its proper divisors (11929976967).

155089700389 is a wasteful number, since it uses less digits than its factorization.

155089700389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11929976966.

The product of its (nonzero) digits is 2721600, while the sum is 55.

The spelling of 155089700389 in words is "one hundred fifty-five billion, eighty-nine million, seven hundred thousand, three hundred eighty-nine".