61228577377 has 16 divisors (see below), whose sum is σ = 67087025280. Its totient is φ = 55419078400.

The previous prime is 61228577353. The next prime is 61228577393. The reversal of 61228577377 is 77377582216.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61228577377 is a prime.

It is a super-2 number, since 2×61228577377² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61228577077) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6154227 + ... + 6164167.

It is an arithmetic number, because the mean of its divisors is an integer number (4192939080).

Almost surely, 2^61228577377 is an apocalyptic number.

It is an amenable number.

61228577377 is a deficient number, since it is larger than the sum of its proper divisors (5858447903).

61228577377 is a wasteful number, since it uses less digits than its factorization.

61228577377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12344.

The product of its digits is 6914880, while the sum is 55.

The spelling of 61228577377 in words is "sixty-one billion, two hundred twenty-eight million, five hundred seventy-seven thousand, three hundred seventy-seven".