77722737215640 has 256 divisors, whose sum is σ = 259532120010240. Its totient is φ = 18462996480000.

The previous prime is 77722737215603. The next prime is 77722737215653. The reversal of 77722737215640 is 4651273722777.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9926995 + ... + 15937085.

It is an arithmetic number, because the mean of its divisors is an integer number (1013797343790).

Almost surely, 2^{77722737215640} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77722737215640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129766060005120).

77722737215640 is an abundant number, since it is smaller than the sum of its proper divisors (181809382794600).

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

77722737215640 is a wasteful number, since it uses less digits than its factorization.

77722737215640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6010314 (or 6010310 counting only the distinct ones).

The product of its (nonzero) digits is 48404160, while the sum is 60.

The spelling of 77722737215640 in words is "seventy-seven trillion, seven hundred twenty-two billion, seven hundred thirty-seven million, two hundred fifteen thousand, six hundred forty".