245290021550 has 24 divisors (see below), whose sum is σ = 521416503696. Its totient is φ = 84099435840.

The previous prime is 245290021547. The next prime is 245290021597. The reversal of 245290021550 is 55120092542.

245290021550 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 245290021550.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 350413967 + ... + 350414666.

It is an arithmetic number, because the mean of its divisors is an integer number (21725687654).

Almost surely, 2^245290021550 is an apocalyptic number.

245290021550 is an abundant number, since it is smaller than the sum of its proper divisors (276126482146).

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

245290021550 is a wasteful number, since it uses less digits than its factorization.

245290021550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700828652 (or 700828647 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 35.

The spelling of 245290021550 in words is "two hundred forty-five billion, two hundred ninety million, twenty-one thousand, five hundred fifty".