61761481 has 2 divisors, whose sum is σ = 61761482. Its totient is φ = 61761480.

The previous prime is 61761467. The next prime is 61761499. The reversal of 61761481 is 18416716.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50765625 + 10995856 = 7125^2 + 3316^2 .

It is a cyclic number.

It is not a de Polignac number, because 61761481 - 2⁵ = 61761449 is a prime.

It is a super-2 number, since 2×61761481² = 7628961070626722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (61761421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30880740 + 30880741.

It is an arithmetic number, because the mean of its divisors is an integer number (30880741).

Almost surely, 2^61761481 is an apocalyptic number.

It is an amenable number.

61761481 is a deficient number, since it is larger than the sum of its proper divisors (1).

61761481 is an equidigital number, since it uses as much as digits as its factorization.

61761481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 34.

The square root of 61761481 is about 7858.8473073346. The cubic root of 61761481 is about 395.2809644453.

It can be divided in two parts, 61 and 761481, that multiplied together give a triangular number (46450341 = T₉₆₃₈).

The spelling of 61761481 in words is "sixty-one million, seven hundred sixty-one thousand, four hundred eighty-one".