561373950 has 24 divisors (see below), whose sum is σ = 1392207768. Its totient is φ = 149699680.

The previous prime is 561373931. The next prime is 561373957. The reversal of 561373950 is 59373165.

It is a junction number, because it is equal to n+sod(n) for n = 561373899 and 561373908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561373957) 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, 1871097 + ... + 1871396.

It is an arithmetic number, because the mean of its divisors is an integer number (58008657).

Almost surely, 2^561373950 is an apocalyptic number.

561373950 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

561373950 is an abundant number, since it is smaller than the sum of its proper divisors (830833818).

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

561373950 is a wasteful number, since it uses less digits than its factorization.

561373950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3742508 (or 3742503 counting only the distinct ones).

The product of its (nonzero) digits is 85050, while the sum is 39.

The square root of 561373950 is about 23693.3313402738. The cubic root of 561373950 is about 824.9306094071.

The spelling of 561373950 in words is "five hundred sixty-one million, three hundred seventy-three thousand, nine hundred fifty".