155378954 has 4 divisors (see below), whose sum is σ = 233068434. Its totient is φ = 77689476.

The previous prime is 155378953. The next prime is 155378983. The reversal of 155378954 is 459873551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 459873551 = 10753 ⋅42767.

It can be written as a sum of positive squares in only one way, i.e., 139594225 + 15784729 = 11815^2 + 3973^2 .

It is a super-2 number, since 2×155378954² = 48285238692268232, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 155378899 and 155378908.

It is not an unprimeable number, because it can be changed into a prime (155378953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38844737 + ... + 38844740.

Almost surely, 2^155378954 is an apocalyptic number.

155378954 is a deficient number, since it is larger than the sum of its proper divisors (77689480).

155378954 is an equidigital number, since it uses as much as digits as its factorization.

155378954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77689479.

The product of its digits is 756000, while the sum is 47.

The square root of 155378954 is about 12465.1094660256. The cubic root of 155378954 is about 537.6059473142.

The spelling of 155378954 in words is "one hundred fifty-five million, three hundred seventy-eight thousand, nine hundred fifty-four".