26380977480 has 640 divisors, whose sum is σ = 105424260480. Its totient is φ = 5832622080.

The previous prime is 26380977409. The next prime is 26380977499. The reversal of 26380977480 is 8477908362.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 44941747 + ... + 44942333.

It is an arithmetic number, because the mean of its divisors is an integer number (164725407).

Almost surely, 2^26380977480 is an apocalyptic number.

26380977480 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 26380977480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52712130240).

26380977480 is an abundant number, since it is smaller than the sum of its proper divisors (79043283000).

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

26380977480 is a wasteful number, since it uses less digits than its factorization.

26380977480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731 (or 718 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 54.

The spelling of 26380977480 in words is "twenty-six billion, three hundred eighty million, nine hundred seventy-seven thousand, four hundred eighty".