1561225503882 has 64 divisors (see below), whose sum is σ = 3763493673984. Its totient is φ = 425909763840.

The previous prime is 1561225503881. The next prime is 1561225503883. The reversal of 1561225503882 is 2883055221651.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1561225503881) and next prime (1561225503883).

It is not an unprimeable number, because it can be changed into a prime (1561225503881) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30223468 + ... + 30275079.

It is an arithmetic number, because the mean of its divisors is an integer number (58804588656).

Almost surely, 2^{1561225503882} is an apocalyptic number.

1561225503882 is an abundant number, since it is smaller than the sum of its proper divisors (2202268170102).

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

1561225503882 is a wasteful number, since it uses less digits than its factorization.

1561225503882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60498603.

The product of its (nonzero) digits is 1152000, while the sum is 48.

The spelling of 1561225503882 in words is "one trillion, five hundred sixty-one billion, two hundred twenty-five million, five hundred three thousand, eight hundred eighty-two".