1245355520550 has 24 divisors (see below), whose sum is σ = 3088481691336. Its totient is φ = 332094805440.

The previous prime is 1245355520501. The next prime is 1245355520551. The reversal of 1245355520550 is 550255535421.

It is a super-2 number, since 2×1245355520550² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245355520551) 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, 4151184919 + ... + 4151185218.

It is an arithmetic number, because the mean of its divisors is an integer number (128686737139).

Almost surely, 2^{1245355520550} is an apocalyptic number.

1245355520550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1245355520550 is an abundant number, since it is smaller than the sum of its proper divisors (1843126170786).

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

1245355520550 is a wasteful number, since it uses less digits than its factorization.

1245355520550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8302370152 (or 8302370147 counting only the distinct ones).

The product of its (nonzero) digits is 750000, while the sum is 42.

The spelling of 1245355520550 in words is "one trillion, two hundred forty-five billion, three hundred fifty-five million, five hundred twenty thousand, five hundred fifty".