772455199890 has 128 divisors (see below), whose sum is σ = 2142454966272. Its totient is φ = 176159185920.

The previous prime is 772455199843. The next prime is 772455199891. The reversal of 772455199890 is 98991554277.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is not an unprimeable number, because it can be changed into a prime (772455199891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11652579 + ... + 11718681.

It is an arithmetic number, because the mean of its divisors is an integer number (16737929424).

Almost surely, 2^772455199890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 772455199890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1071227483136).

772455199890 is an abundant number, since it is smaller than the sum of its proper divisors (1369999766382).

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

772455199890 is a wasteful number, since it uses less digits than its factorization.

772455199890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68224.

The product of its (nonzero) digits is 57153600, while the sum is 66.

The spelling of 772455199890 in words is "seven hundred seventy-two billion, four hundred fifty-five million, one hundred ninety-nine thousand, eight hundred ninety".