245156521023 has 16 divisors (see below), whose sum is σ = 364355225440. Its totient is φ = 162915509952.

The previous prime is 245156521013. The next prime is 245156521069. The reversal of 245156521023 is 320125651542.

245156521023 is a `hidden beast` number, since 2 + 4 + 51 + 565 + 21 + 0 + 23 = 666.

It is not a de Polignac number, because 245156521023 - 2⁴ = 245156521007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245156521013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14496136 + ... + 14513037.

It is an arithmetic number, because the mean of its divisors is an integer number (22772201590).

Almost surely, 2^245156521023 is an apocalyptic number.

245156521023 is a deficient number, since it is larger than the sum of its proper divisors (119198704417).

245156521023 is a wasteful number, since it uses less digits than its factorization.

245156521023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29009495 (or 29009489 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The spelling of 245156521023 in words is "two hundred forty-five billion, one hundred fifty-six million, five hundred twenty-one thousand, twenty-three".