16642665031 has 2 divisors, whose sum is σ = 16642665032. Its totient is φ = 16642665030.

The previous prime is 16642665007. The next prime is 16642665047. The reversal of 16642665031 is 13056624661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16642665031 - 2⁵ = 16642664999 is a prime.

It is a super-2 number, since 2×16642665031² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16642665331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8321332515 + 8321332516.

It is an arithmetic number, because the mean of its divisors is an integer number (8321332516).

Almost surely, 2^16642665031 is an apocalyptic number.

16642665031 is a deficient number, since it is larger than the sum of its proper divisors (1).

16642665031 is an equidigital number, since it uses as much as digits as its factorization.

16642665031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 40.

The spelling of 16642665031 in words is "sixteen billion, six hundred forty-two million, six hundred sixty-five thousand, thirty-one".