11656420007 has 16 divisors (see below), whose sum is σ = 12030488064. Its totient is φ = 11286912000.

The previous prime is 11656420003. The next prime is 11656420031. The reversal of 11656420007 is 70002465611.

It is a cyclic number.

It is not a de Polignac number, because 11656420007 - 2² = 11656420003 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11656420001) 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, 4078523 + ... + 4081379.

It is an arithmetic number, because the mean of its divisors is an integer number (751905504).

Almost surely, 2^11656420007 is an apocalyptic number.

11656420007 is a deficient number, since it is larger than the sum of its proper divisors (374068057).

11656420007 is a wasteful number, since it uses less digits than its factorization.

11656420007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3610.

The product of its (nonzero) digits is 10080, while the sum is 32.

Adding to 11656420007 its reverse (70002465611), we get a palindrome (81658885618).

The spelling of 11656420007 in words is "eleven billion, six hundred fifty-six million, four hundred twenty thousand, seven".