611221220016 has 80 divisors (see below), whose sum is σ = 1722797293440. Its totient is φ = 185190082560.

The previous prime is 611221219993. The next prime is 611221220017. The reversal of 611221220016 is 610022122116.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (611221220017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3485280 + ... + 3656448.

It is an arithmetic number, because the mean of its divisors is an integer number (21534966168).

Almost surely, 2^611221220016 is an apocalyptic number.

611221220016 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

611221220016 is an abundant number, since it is smaller than the sum of its proper divisors (1111576073424).

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

611221220016 is a wasteful number, since it uses less digits than its factorization.

611221220016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177954 (or 177948 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The spelling of 611221220016 in words is "six hundred eleven billion, two hundred twenty-one million, two hundred twenty thousand, sixteen".