31420510378637 has 2 divisors, whose sum is σ = 31420510378638. Its totient is φ = 31420510378636.

The previous prime is 31420510378619. The next prime is 31420510378639. The reversal of 31420510378637 is 73687301502413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20923616686756 + 10496893691881 = 4574234^2 + 3239891^2 .

It is a cyclic number.

It is not a de Polignac number, because 31420510378637 - 2¹² = 31420510374541 is a prime.

Together with 31420510378639, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31420510378639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15710255189318 + 15710255189319.

It is an arithmetic number, because the mean of its divisors is an integer number (15710255189319).

Almost surely, 2^{31420510378637} is an apocalyptic number.

It is an amenable number.

31420510378637 is a deficient number, since it is larger than the sum of its proper divisors (1).

31420510378637 is an equidigital number, since it uses as much as digits as its factorization.

31420510378637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2540160, while the sum is 50.

The spelling of 31420510378637 in words is "thirty-one trillion, four hundred twenty billion, five hundred ten million, three hundred seventy-eight thousand, six hundred thirty-seven".