77722084440 has 1024 divisors, whose sum is σ = 368395776000. Its totient is φ = 14027489280.

The previous prime is 77722084439. The next prime is 77722084483. The reversal of 77722084440 is 4448022777.

It is a super-2 number, since 2×77722084440² (a number of 23 digits) contains 22 as substring.

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 255 ways as a sum of consecutive naturals, for example, 18376246 + ... + 18380474.

It is an arithmetic number, because the mean of its divisors is an integer number (359761500).

Almost surely, 2^77722084440 is an apocalyptic number.

77722084440 is a gapful number since it is divisible by the number (70) 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 77722084440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (184197888000).

77722084440 is an abundant number, since it is smaller than the sum of its proper divisors (290673691560).

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

77722084440 is a wasteful number, since it uses less digits than its factorization.

77722084440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4297 (or 4287 counting only the distinct ones).

The product of its (nonzero) digits is 702464, while the sum is 45.

The spelling of 77722084440 in words is "seventy-seven billion, seven hundred twenty-two million, eighty-four thousand, four hundred forty".