2011566601716 has 48 divisors (see below), whose sum is σ = 5364746343936. Its totient is φ = 574672378464.

The previous prime is 2011566601691. The next prime is 2011566601757. The reversal of 2011566601716 is 6171066651102.

It is a happy number.

It is a super-3 number, since 3×2011566601716³ (a number of 38 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 469546 + ... + 2060001.

It is an arithmetic number, because the mean of its divisors is an integer number (111765548832).

Almost surely, 2^{2011566601716} is an apocalyptic number.

It is an amenable number.

2011566601716 is an abundant number, since it is smaller than the sum of its proper divisors (3353179742220).

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

2011566601716 is a wasteful number, since it uses less digits than its factorization.

2011566601716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2539028 (or 2539026 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 42.

The spelling of 2011566601716 in words is "two trillion, eleven billion, five hundred sixty-six million, six hundred one thousand, seven hundred sixteen".