737421686861 has 2 divisors, whose sum is σ = 737421686862. Its totient is φ = 737421686860.

The previous prime is 737421686801. The next prime is 737421686863. The reversal of 737421686861 is 168686124737.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 620991280900 + 116430405961 = 788030^2 + 341219^2 .

It is a cyclic number.

It is not a de Polignac number, because 737421686861 - 2¹⁴ = 737421670477 is a prime.

Together with 737421686863, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 737421686861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (737421686863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 368710843430 + 368710843431.

It is an arithmetic number, because the mean of its divisors is an integer number (368710843431).

Almost surely, 2^737421686861 is an apocalyptic number.

It is an amenable number.

737421686861 is a deficient number, since it is larger than the sum of its proper divisors (1).

737421686861 is an equidigital number, since it uses as much as digits as its factorization.

737421686861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16257024, while the sum is 59.

The spelling of 737421686861 in words is "seven hundred thirty-seven billion, four hundred twenty-one million, six hundred eighty-six thousand, eight hundred sixty-one".