142155139540 has 24 divisors (see below), whose sum is σ = 298532876040. Its totient is φ = 56860706688.

The previous prime is 142155139517. The next prime is 142155139559. The reversal of 142155139540 is 45931551241.

It can be written as a sum of positive squares in 4 ways, for example, as 2280635536 + 139874504004 = 47756^2 + 373998^2 .

It is a junction number, because it is equal to n+sod(n) for n = 142155139493 and 142155139502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1613346 + ... + 1699174.

It is an arithmetic number, because the mean of its divisors is an integer number (12438869835).

Almost surely, 2^142155139540 is an apocalyptic number.

142155139540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142155139540 is an abundant number, since it is smaller than the sum of its proper divisors (156377736500).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

142155139540 is a wasteful number, since it uses less digits than its factorization.

142155139540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168651 (or 168649 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 40.

The spelling of 142155139540 in words is "one hundred forty-two billion, one hundred fifty-five million, one hundred thirty-nine thousand, five hundred forty".