61217827377 has 16 divisors (see below), whose sum is σ = 93310172160. Its totient is φ = 34971916752.

The previous prime is 61217827361. The next prime is 61217827409. The reversal of 61217827377 is 77372871216.

61217827377 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61217827377 - 2⁴ = 61217827361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61217827357) 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, 326227 + ... + 478392.

It is an arithmetic number, because the mean of its divisors is an integer number (5831885760).

Almost surely, 2^61217827377 is an apocalyptic number.

It is an amenable number.

61217827377 is a deficient number, since it is larger than the sum of its proper divisors (32092344783).

61217827377 is a wasteful number, since it uses less digits than its factorization.

61217827377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 808252.

The product of its digits is 1382976, while the sum is 51.

The spelling of 61217827377 in words is "sixty-one billion, two hundred seventeen million, eight hundred twenty-seven thousand, three hundred seventy-seven".