255237636478 has 8 divisors (see below), whose sum is σ = 417661587000. Its totient is φ = 116017107480.

The previous prime is 255237636473. The next prime is 255237636481. The reversal of 255237636478 is 874636732552.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255237636473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5800855353 + ... + 5800855396.

It is an arithmetic number, because the mean of its divisors is an integer number (52207698375).

Almost surely, 2^255237636478 is an apocalyptic number.

255237636478 is a deficient number, since it is larger than the sum of its proper divisors (162423950522).

255237636478 is a wasteful number, since it uses less digits than its factorization.

255237636478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11601710762.

The product of its digits is 50803200, while the sum is 58.

The spelling of 255237636478 in words is "two hundred fifty-five billion, two hundred thirty-seven million, six hundred thirty-six thousand, four hundred seventy-eight".