142778217850 has 12 divisors (see below), whose sum is σ = 265567485294. Its totient is φ = 57111287120.

The previous prime is 142778217847. The next prime is 142778217851. The reversal of 142778217850 is 58712877241.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 90948686929 + 51829530921 = 301577^2 + 227661^2 .

It is not an unprimeable number, because it can be changed into a prime (142778217851) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1427782129 + ... + 1427782228.

Almost surely, 2^142778217850 is an apocalyptic number.

142778217850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

142778217850 is a deficient number, since it is larger than the sum of its proper divisors (122789267444).

142778217850 is a wasteful number, since it uses less digits than its factorization.

142778217850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2855564369 (or 2855564364 counting only the distinct ones).

The product of its (nonzero) digits is 1756160, while the sum is 52.

The spelling of 142778217850 in words is "one hundred forty-two billion, seven hundred seventy-eight million, two hundred seventeen thousand, eight hundred fifty".