61778088801 has 64 divisors (see below), whose sum is σ = 109552746240. Its totient is φ = 33908958720.

The previous prime is 61778088751. The next prime is 61778088811. The reversal of 61778088801 is 10888087716.

It is a happy number.

It is not a de Polignac number, because 61778088801 - 2⁶ = 61778088737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61778088811) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 53685 + ... + 355581.

It is an arithmetic number, because the mean of its divisors is an integer number (1711761660).

Almost surely, 2^61778088801 is an apocalyptic number.

It is an amenable number.

61778088801 is a deficient number, since it is larger than the sum of its proper divisors (47774657439).

61778088801 is a wasteful number, since it uses less digits than its factorization.

61778088801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301983 (or 301977 counting only the distinct ones).

The product of its (nonzero) digits is 1204224, while the sum is 54.

The spelling of 61778088801 in words is "sixty-one billion, seven hundred seventy-eight million, eighty-eight thousand, eight hundred one".