245661156 has 72 divisors (see below), whose sum is σ = 674017344. Its totient is φ = 74992320.

The previous prime is 245661149. The next prime is 245661173. The reversal of 245661156 is 651166542.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 245661156.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 59305 + ... + 63311.

It is an arithmetic number, because the mean of its divisors is an integer number (9361352).

Almost surely, 2^245661156 is an apocalyptic number.

245661156 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 245661156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (337008672).

245661156 is an abundant number, since it is smaller than the sum of its proper divisors (428356188).

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

245661156 is a wasteful number, since it uses less digits than its factorization.

245661156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4161 (or 4156 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 245661156 is about 15673.5814669143. The cubic root of 245661156 is about 626.2948353763.

The spelling of 245661156 in words is "two hundred forty-five million, six hundred sixty-one thousand, one hundred fifty-six".