61779941416 has 64 divisors (see below), whose sum is σ = 128242828800. Its totient is φ = 27785721600.

The previous prime is 61779941411. The next prime is 61779941437. The reversal of 61779941416 is 61414997716.

It is a happy number.

It is a super-2 number, since 2×61779941416² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61779941411) 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, 126046 + ... + 373426.

It is an arithmetic number, because the mean of its divisors is an integer number (2003794200).

Almost surely, 2^61779941416 is an apocalyptic number.

It is an amenable number.

61779941416 is an abundant number, since it is smaller than the sum of its proper divisors (66462887384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61779941416 is a wasteful number, since it uses less digits than its factorization.

61779941416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247490 (or 247486 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 55.

The spelling of 61779941416 in words is "sixty-one billion, seven hundred seventy-nine million, nine hundred forty-one thousand, four hundred sixteen".