155350978 has 4 divisors (see below), whose sum is σ = 233026470. Its totient is φ = 77675488.

The previous prime is 155350967. The next prime is 155350991. The reversal of 155350978 is 879053551.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 154828249 + 522729 = 12443^2 + 723^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38837743 + ... + 38837746.

Almost surely, 2^155350978 is an apocalyptic number.

155350978 is a deficient number, since it is larger than the sum of its proper divisors (77675492).

155350978 is an equidigital number, since it uses as much as digits as its factorization.

155350978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77675491.

The product of its (nonzero) digits is 189000, while the sum is 43.

The square root of 155350978 is about 12463.9872432541. The cubic root of 155350978 is about 537.5736800384.

The spelling of 155350978 in words is "one hundred fifty-five million, three hundred fifty thousand, nine hundred seventy-eight".