61903639079 has 2 divisors, whose sum is σ = 61903639080. Its totient is φ = 61903639078.

The previous prime is 61903639003. The next prime is 61903639097. The reversal of 61903639079 is 97093630916.

It is a happy number.

Together with next prime (61903639097) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61903639079 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61903639079.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61903639579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30951819539 + 30951819540.

It is an arithmetic number, because the mean of its divisors is an integer number (30951819540).

Almost surely, 2^61903639079 is an apocalyptic number.

61903639079 is a deficient number, since it is larger than the sum of its proper divisors (1).

61903639079 is an equidigital number, since it uses as much as digits as its factorization.

61903639079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1653372, while the sum is 53.

The spelling of 61903639079 in words is "sixty-one billion, nine hundred three million, six hundred thirty-nine thousand, seventy-nine".