61155679 has 4 divisors (see below), whose sum is σ = 65859976. Its totient is φ = 56451384.

The previous prime is 61155671. The next prime is 61155701. The reversal of 61155679 is 97655116.

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 61155679 - 2³ = 61155671 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61155671) 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, 2352129 + ... + 2352154.

It is an arithmetic number, because the mean of its divisors is an integer number (16464994).

Almost surely, 2^61155679 is an apocalyptic number.

61155679 is a deficient number, since it is larger than the sum of its proper divisors (4704297).

61155679 is a wasteful number, since it uses less digits than its factorization.

61155679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4704296.

The product of its digits is 56700, while the sum is 40.

The square root of 61155679 is about 7820.2096519211. The cubic root of 61155679 is about 393.9843135809.

The spelling of 61155679 in words is "sixty-one million, one hundred fifty-five thousand, six hundred seventy-nine".