142640172647 has 16 divisors (see below), whose sum is σ = 178558551360. Its totient is φ = 111103093248.

The previous prime is 142640172643. The next prime is 142640172659. The reversal of 142640172647 is 746271046241.

It is not a de Polignac number, because 142640172647 - 2² = 142640172643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 142640172598 and 142640172607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142640172643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20663048 + ... + 20669949.

It is an arithmetic number, because the mean of its divisors is an integer number (11159909460).

Almost surely, 2^142640172647 is an apocalyptic number.

142640172647 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

142640172647 is a deficient number, since it is larger than the sum of its proper divisors (35918378713).

142640172647 is a wasteful number, since it uses less digits than its factorization.

142640172647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41333050.

The product of its (nonzero) digits is 451584, while the sum is 44.

The spelling of 142640172647 in words is "one hundred forty-two billion, six hundred forty million, one hundred seventy-two thousand, six hundred forty-seven".