155680377 has 4 divisors (see below), whose sum is σ = 207573840. Its totient is φ = 103786916.

The previous prime is 155680363. The next prime is 155680429. The reversal of 155680377 is 773086551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 155680377 - 2¹² = 155676281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155690377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25946727 + ... + 25946732.

It is an arithmetic number, because the mean of its divisors is an integer number (51893460).

Almost surely, 2^155680377 is an apocalyptic number.

It is an amenable number.

155680377 is a deficient number, since it is larger than the sum of its proper divisors (51893463).

155680377 is an equidigital number, since it uses as much as digits as its factorization.

155680377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51893462.

The product of its (nonzero) digits is 176400, while the sum is 42.

The square root of 155680377 is about 12477.1942759580. The cubic root of 155680377 is about 537.9533605686.

The spelling of 155680377 in words is "one hundred fifty-five million, six hundred eighty thousand, three hundred seventy-seven".