278055525550 has 36 divisors (see below), whose sum is σ = 568474193448. Its totient is φ = 101111098000.

The previous prime is 278055525541. The next prime is 278055525551. The reversal of 278055525550 is 55525550872.

It is a junction number, because it is equal to n+sod(n) for n = 278055525494 and 278055525503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278055525551) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 22973746 + ... + 22985845.

It is an arithmetic number, because the mean of its divisors is an integer number (15790949818).

Almost surely, 2^278055525550 is an apocalyptic number.

278055525550 is an abundant number, since it is smaller than the sum of its proper divisors (290418667898).

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

278055525550 is a wasteful number, since it uses less digits than its factorization.

278055525550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45959625 (or 45959609 counting only the distinct ones).

The product of its (nonzero) digits is 3500000, while the sum is 49.

The spelling of 278055525550 in words is "two hundred seventy-eight billion, fifty-five million, five hundred twenty-five thousand, five hundred fifty".