61555421165704 has 16 divisors (see below), whose sum is σ = 115417375330320. Its totient is φ = 30777454410960.

The previous prime is 61555421165701. The next prime is 61555421165741. The reversal of 61555421165704 is 40756112455516.

It is not an unprimeable number, because it can be changed into a prime (61555421165701) 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, 30998334 + ... + 32924269.

It is an arithmetic number, because the mean of its divisors is an integer number (7213585958145).

Almost surely, 2^{61555421165704} is an apocalyptic number.

It is an amenable number.

61555421165704 is a deficient number, since it is larger than the sum of its proper divisors (53861954164616).

61555421165704 is a wasteful number, since it uses less digits than its factorization.

61555421165704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64042980 (or 64042976 counting only the distinct ones).

The product of its (nonzero) digits is 5040000, while the sum is 52.

The spelling of 61555421165704 in words is "sixty-one trillion, five hundred fifty-five billion, four hundred twenty-one million, one hundred sixty-five thousand, seven hundred four".