61367513771 has 2 divisors, whose sum is σ = 61367513772. Its totient is φ = 61367513770.

The previous prime is 61367513743. The next prime is 61367513773. The reversal of 61367513771 is 17731576316.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61367513771 - 2³⁰ = 60293771947 is a prime.

Together with 61367513773, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61367513773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30683756885 + 30683756886.

It is an arithmetic number, because the mean of its divisors is an integer number (30683756886).

Almost surely, 2^61367513771 is an apocalyptic number.

61367513771 is a deficient number, since it is larger than the sum of its proper divisors (1).

61367513771 is an equidigital number, since it uses as much as digits as its factorization.

61367513771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 555660, while the sum is 47.

The spelling of 61367513771 in words is "sixty-one billion, three hundred sixty-seven million, five hundred thirteen thousand, seven hundred seventy-one".