615142205255542 has 4 divisors (see below), whose sum is σ = 922713307883316. Its totient is φ = 307571102627770.

The previous prime is 615142205255519. The next prime is 615142205255551. The reversal of 615142205255542 is 245552502241516.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153785551313884 + ... + 153785551313887.

It is an arithmetic number, because the mean of its divisors is an integer number (230678326970829).

Almost surely, 2^{615142205255542} is an apocalyptic number.

615142205255542 is a deficient number, since it is larger than the sum of its proper divisors (307571102627774).

615142205255542 is a wasteful number, since it uses less digits than its factorization.

615142205255542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307571102627773.

The product of its (nonzero) digits is 4800000, while the sum is 49.

The spelling of 615142205255542 in words is "six hundred fifteen trillion, one hundred forty-two billion, two hundred five million, two hundred fifty-five thousand, five hundred forty-two".