245436374502621 has 6 divisors (see below), whose sum is σ = 354519207614910. Its totient is φ = 163624249668408.

The previous prime is 245436374502581. The next prime is 245436374502623. The reversal of 245436374502621 is 126205473634542.

245436374502621 is a `hidden beast` number, since 2 + 4 + 5 + 4 + 3 + 6 + 3 + 7 + 4 + 5 + 0 + 2 + 621 = 666.

It can be written as a sum of positive squares in only one way, i.e., 226610451459396 + 18825923043225 = 15053586^2 + 4338885^2 .

It is not a de Polignac number, because 245436374502621 - 2⁷ = 245436374502493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245436374502623) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13635354139026 + ... + 13635354139043.

It is an arithmetic number, because the mean of its divisors is an integer number (59086534602485).

Almost surely, 2^{245436374502621} is an apocalyptic number.

It is an amenable number.

245436374502621 is a deficient number, since it is larger than the sum of its proper divisors (109082833112289).

245436374502621 is a wasteful number, since it uses less digits than its factorization.

245436374502621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27270708278075 (or 27270708278072 counting only the distinct ones).

The product of its (nonzero) digits is 29030400, while the sum is 54.

The spelling of 245436374502621 in words is "two hundred forty-five trillion, four hundred thirty-six billion, three hundred seventy-four million, five hundred two thousand, six hundred twenty-one".