145963778 has 4 divisors (see below), whose sum is σ = 218945670. Its totient is φ = 72981888.

The previous prime is 145963747. The next prime is 145963787. The reversal of 145963778 is 877369541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 877369541 = 17 ⋅51609973.

It can be written as a sum of positive squares in only one way, i.e., 145130209 + 833569 = 12047^2 + 913^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36490943 + ... + 36490946.

Almost surely, 2^145963778 is an apocalyptic number.

145963778 is a deficient number, since it is larger than the sum of its proper divisors (72981892).

145963778 is an equidigital number, since it uses as much as digits as its factorization.

145963778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72981891.

The product of its digits is 1270080, while the sum is 50.

The square root of 145963778 is about 12081.5470035919. The cubic root of 145963778 is about 526.5201931152.

The spelling of 145963778 in words is "one hundred forty-five million, nine hundred sixty-three thousand, seven hundred seventy-eight".