26378250390 has 192 divisors, whose sum is σ = 71237117952. Its totient is φ = 6768403200.

The previous prime is 26378250377. The next prime is 26378250403. The reversal of 26378250390 is 9305287362.

26378250390 is a `hidden beast` number, since 2 + 6 + 3 + 7 + 8 + 250 + 390 = 666.

It is an interprime number because it is at equal distance from previous prime (26378250377) and next prime (26378250403).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 100297399 + ... + 100297661.

It is an arithmetic number, because the mean of its divisors is an integer number (371026656).

Almost surely, 2^26378250390 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26378250390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35618558976).

26378250390 is an abundant number, since it is smaller than the sum of its proper divisors (44858867562).

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

26378250390 is a wasteful number, since it uses less digits than its factorization.

26378250390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635 (or 632 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 45.

The spelling of 26378250390 in words is "twenty-six billion, three hundred seventy-eight million, two hundred fifty thousand, three hundred ninety".