245656721145 has 64 divisors (see below), whose sum is σ = 439746693120. Its totient is φ = 116067417600.

The previous prime is 245656721113. The next prime is 245656721179. The reversal of 245656721145 is 541127656542.

It is not a de Polignac number, because 245656721145 - 2⁵ = 245656721113 is a prime.

It is a super-2 number, since 2×245656721145² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 245656721094 and 245656721103.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5980086 + ... + 6021024.

It is an arithmetic number, because the mean of its divisors is an integer number (6871042080).

Almost surely, 2^245656721145 is an apocalyptic number.

It is an amenable number.

245656721145 is a deficient number, since it is larger than the sum of its proper divisors (194089971975).

245656721145 is a wasteful number, since it uses less digits than its factorization.

245656721145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41886.

The product of its digits is 2016000, while the sum is 48.

The spelling of 245656721145 in words is "two hundred forty-five billion, six hundred fifty-six million, seven hundred twenty-one thousand, one hundred forty-five".