61655056507 has 4 divisors (see below), whose sum is σ = 67260061656. Its totient is φ = 56050051360.

The previous prime is 61655056501. The next prime is 61655056571. The reversal of 61655056507 is 70565055616.

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

It is a cyclic number.

It is not a de Polignac number, because 61655056507 - 2¹¹ = 61655054459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61655056501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2802502558 + ... + 2802502579.

It is an arithmetic number, because the mean of its divisors is an integer number (16815015414).

Almost surely, 2^61655056507 is an apocalyptic number.

61655056507 is a deficient number, since it is larger than the sum of its proper divisors (5605005149).

61655056507 is a wasteful number, since it uses less digits than its factorization.

61655056507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5605005148.

The product of its (nonzero) digits is 945000, while the sum is 46.

The spelling of 61655056507 in words is "sixty-one billion, six hundred fifty-five million, fifty-six thousand, five hundred seven".