61371747655 has 16 divisors (see below), whose sum is σ = 75228549120. Its totient is φ = 48042861472.

The previous prime is 61371747637. The next prime is 61371747761. The reversal of 61371747655 is 55674717316.

It is a cyclic number.

It is not a de Polignac number, because 61371747655 - 2¹³ = 61371739463 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1241706 + ... + 1290184.

It is an arithmetic number, because the mean of its divisors is an integer number (4701784320).

Almost surely, 2^61371747655 is an apocalyptic number.

61371747655 is a deficient number, since it is larger than the sum of its proper divisors (13856801465).

61371747655 is a wasteful number, since it uses less digits than its factorization.

61371747655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53918.

The product of its digits is 3704400, while the sum is 52.

The spelling of 61371747655 in words is "sixty-one billion, three hundred seventy-one million, seven hundred forty-seven thousand, six hundred fifty-five".