22779261840 has 40 divisors (see below), whose sum is σ = 70615712448. Its totient is φ = 6074469760.

The previous prime is 22779261833. The next prime is 22779261871. The reversal of 22779261840 is 4816297722.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 22779261840.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47456556 + ... + 47457035.

Almost surely, 2^22779261840 is an apocalyptic number.

22779261840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22779261840 is an abundant number, since it is smaller than the sum of its proper divisors (47836450608).

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

22779261840 is a wasteful number, since it uses less digits than its factorization.

22779261840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94913607 (or 94913601 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 48.

The spelling of 22779261840 in words is "twenty-two billion, seven hundred seventy-nine million, two hundred sixty-one thousand, eight hundred forty".