61674062477 has 4 divisors (see below), whose sum is σ = 61674781980. Its totient is φ = 61673342976.

The previous prime is 61674062473. The next prime is 61674062501. The reversal of 61674062477 is 77426047616.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15210535561 + 46463526916 = 123331^2 + 215554^2 .

It is a cyclic number.

It is not a de Polignac number, because 61674062477 - 2² = 61674062473 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61674062473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210548 + ... + 409485.

It is an arithmetic number, because the mean of its divisors is an integer number (15418695495).

Almost surely, 2^61674062477 is an apocalyptic number.

It is an amenable number.

61674062477 is a deficient number, since it is larger than the sum of its proper divisors (719503).

61674062477 is an equidigital number, since it uses as much as digits as its factorization.

61674062477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719502.

The product of its (nonzero) digits is 2370816, while the sum is 50.

The spelling of 61674062477 in words is "sixty-one billion, six hundred seventy-four million, sixty-two thousand, four hundred seventy-seven".