16939312501 has 2 divisors, whose sum is σ = 16939312502. Its totient is φ = 16939312500.

The previous prime is 16939312471. The next prime is 16939312541. The reversal of 16939312501 is 10521393961.

It is an a-pointer prime, because the next prime (16939312541) can be obtained adding 16939312501 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15625250001 + 1314062500 = 125001^2 + 36250^2 .

It is a cyclic number.

It is not a de Polignac number, because 16939312501 - 2⁷ = 16939312373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16939312541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8469656250 + 8469656251.

It is an arithmetic number, because the mean of its divisors is an integer number (8469656251).

Almost surely, 2^16939312501 is an apocalyptic number.

It is an amenable number.

16939312501 is a deficient number, since it is larger than the sum of its proper divisors (1).

16939312501 is an equidigital number, since it uses as much as digits as its factorization.

16939312501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43740, while the sum is 40.

The spelling of 16939312501 in words is "sixteen billion, nine hundred thirty-nine million, three hundred twelve thousand, five hundred one".