155191676645 has 18 divisors (see below), whose sum is σ = 190927425366. Its totient is φ = 121097022720.

The previous prime is 155191676609. The next prime is 155191676681. The reversal of 155191676645 is 546676191551.

It is an interprime number because it is at equal distance from previous prime (155191676609) and next prime (155191676681).

It can be written as a sum of positive squares in 9 ways, for example, as 108756167524 + 46435509121 = 329782^2 + 215489^2 .

It is not a de Polignac number, because 155191676645 - 2¹⁸ = 155191414501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 36114137 + ... + 36118433.

It is an arithmetic number, because the mean of its divisors is an integer number (10607079187).

Almost surely, 2^155191676645 is an apocalyptic number.

It is an amenable number.

155191676645 is a deficient number, since it is larger than the sum of its proper divisors (35735748721).

155191676645 is an frugal number, since it uses more digits than its factorization.

155191676645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8681 (or 4343 counting only the distinct ones).

The product of its digits is 6804000, while the sum is 56.

The spelling of 155191676645 in words is "one hundred fifty-five billion, one hundred ninety-one million, six hundred seventy-six thousand, six hundred forty-five".