145485447778 has 32 divisors (see below), whose sum is σ = 241053345792. Its totient is φ = 65303664000.

The previous prime is 145485447761. The next prime is 145485447829. The reversal of 145485447778 is 877744584541.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 765550 + ... + 936502.

It is an arithmetic number, because the mean of its divisors is an integer number (7532917056).

Almost surely, 2^145485447778 is an apocalyptic number.

145485447778 is a deficient number, since it is larger than the sum of its proper divisors (95567898014).

145485447778 is a wasteful number, since it uses less digits than its factorization.

145485447778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171450.

The product of its digits is 140492800, while the sum is 64.

The spelling of 145485447778 in words is "one hundred forty-five billion, four hundred eighty-five million, four hundred forty-seven thousand, seven hundred seventy-eight".