278160620920 has 384 divisors, whose sum is σ = 847730419200. Its totient is φ = 79763346432.

The previous prime is 278160620917. The next prime is 278160620923. The reversal of 278160620920 is 29026061872.

It is an interprime number because it is at equal distance from previous prime (278160620917) and next prime (278160620923).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278160620923) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 36581839 + ... + 36589441.

It is an arithmetic number, because the mean of its divisors is an integer number (2207631300).

Almost surely, 2^278160620920 is an apocalyptic number.

278160620920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 278160620920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (423865209600).

278160620920 is an abundant number, since it is smaller than the sum of its proper divisors (569569798280).

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

278160620920 is a wasteful number, since it uses less digits than its factorization.

278160620920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7699 (or 7672 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 43.

The spelling of 278160620920 in words is "two hundred seventy-eight billion, one hundred sixty million, six hundred twenty thousand, nine hundred twenty".