61351777476443 has 2 divisors, whose sum is σ = 61351777476444. Its totient is φ = 61351777476442.

The previous prime is 61351777476439. The next prime is 61351777476547. The reversal of 61351777476443 is 34467477715316.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61351777476443 - 2² = 61351777476439 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61351777476443.

It is not a weakly prime, because it can be changed into another prime (61351777976443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30675888738221 + 30675888738222.

It is an arithmetic number, because the mean of its divisors is an integer number (30675888738222).

Almost surely, 2^{61351777476443} is an apocalyptic number.

61351777476443 is a deficient number, since it is larger than the sum of its proper divisors (1).

61351777476443 is an equidigital number, since it uses as much as digits as its factorization.

61351777476443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248935680, while the sum is 65.

The spelling of 61351777476443 in words is "sixty-one trillion, three hundred fifty-one billion, seven hundred seventy-seven million, four hundred seventy-six thousand, four hundred forty-three".