142779664 has 10 divisors (see below), whose sum is σ = 276635630. Its totient is φ = 71389824.

The previous prime is 142779647. The next prime is 142779667. The reversal of 142779664 is 466977241.

It can be written as a sum of positive squares in only one way, i.e., 112529664 + 30250000 = 10608^2 + 5500^2 .

It is not an unprimeable number, because it can be changed into a prime (142779667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4461849 + ... + 4461880.

It is an arithmetic number, because the mean of its divisors is an integer number (27663563).

Almost surely, 2^142779664 is an apocalyptic number.

It is an amenable number.

142779664 is a deficient number, since it is larger than the sum of its proper divisors (133855966).

142779664 is an equidigital number, since it uses as much as digits as its factorization.

142779664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8923737 (or 8923731 counting only the distinct ones).

The product of its digits is 508032, while the sum is 46.

The square root of 142779664 is about 11949.0444806269. The cubic root of 142779664 is about 522.6634352096.

The spelling of 142779664 in words is "one hundred forty-two million, seven hundred seventy-nine thousand, six hundred sixty-four".