561264487400 has 48 divisors (see below), whose sum is σ = 1361676463200. Its totient is φ = 214744671680.

The previous prime is 561264487349. The next prime is 561264487409. The reversal of 561264487400 is 4784462165.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (561264487409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61002410 + ... + 61011609.

It is an arithmetic number, because the mean of its divisors is an integer number (28368259650).

Almost surely, 2^561264487400 is an apocalyptic number.

561264487400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

561264487400 is an abundant number, since it is smaller than the sum of its proper divisors (800411975800).

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

561264487400 is a wasteful number, since it uses less digits than its factorization.

561264487400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122014058 (or 122014049 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 47.

The spelling of 561264487400 in words is "five hundred sixty-one billion, two hundred sixty-four million, four hundred eighty-seven thousand, four hundred".