61005400004 has 6 divisors (see below), whose sum is σ = 106759450014. Its totient is φ = 30502700000.

The previous prime is 61005399971. The next prime is 61005400009. The reversal of 61005400004 is 40000450016.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 59732337604 + 1273062400 = 244402^2 + 35680^2 .

It is not an unprimeable number, because it can be changed into a prime (61005400009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7625674997 + ... + 7625675004.

It is an arithmetic number, because the mean of its divisors is an integer number (17793241669).

Almost surely, 2^61005400004 is an apocalyptic number.

It is an amenable number.

61005400004 is a deficient number, since it is larger than the sum of its proper divisors (45754050010).

61005400004 is a wasteful number, since it uses less digits than its factorization.

61005400004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15251350005 (or 15251350003 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The spelling of 61005400004 in words is "sixty-one billion, five million, four hundred thousand, four".