61914154498549 has 2 divisors, whose sum is σ = 61914154498550. Its totient is φ = 61914154498548.

The previous prime is 61914154498517. The next prime is 61914154498613. The reversal of 61914154498549 is 94589445141916.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48207262491025 + 13706892007524 = 6943145^2 + 3702282^2 .

It is a cyclic number.

It is not a de Polignac number, because 61914154498549 - 2⁵ = 61914154498517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61914254498549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30957077249274 + 30957077249275.

It is an arithmetic number, because the mean of its divisors is an integer number (30957077249275).

Almost surely, 2^{61914154498549} is an apocalyptic number.

It is an amenable number.

61914154498549 is a deficient number, since it is larger than the sum of its proper divisors (1).

61914154498549 is an equidigital number, since it uses as much as digits as its factorization.

61914154498549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 223948800, while the sum is 70.

The spelling of 61914154498549 in words is "sixty-one trillion, nine hundred fourteen billion, one hundred fifty-four million, four hundred ninety-eight thousand, five hundred forty-nine".