61577087655 has 8 divisors (see below), whose sum is σ = 98523340272. Its totient is φ = 32841113408.

The previous prime is 61577087597. The next prime is 61577087657. The reversal of 61577087655 is 55678077516.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61577087655 - 2⁷ = 61577087527 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61577087595 and 61577087604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61577087657) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2052569574 + ... + 2052569603.

It is an arithmetic number, because the mean of its divisors is an integer number (12315417534).

Almost surely, 2^61577087655 is an apocalyptic number.

61577087655 is a deficient number, since it is larger than the sum of its proper divisors (36946252617).

61577087655 is a wasteful number, since it uses less digits than its factorization.

61577087655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4105139185.

The product of its (nonzero) digits is 12348000, while the sum is 57.

The spelling of 61577087655 in words is "sixty-one billion, five hundred seventy-seven million, eighty-seven thousand, six hundred fifty-five".