245189967421 has 16 divisors (see below), whose sum is σ = 284278892544. Its totient is φ = 207121014144.

The previous prime is 245189967401. The next prime is 245189967497. The reversal of 245189967421 is 124769981542.

It is a cyclic number.

It is not a de Polignac number, because 245189967421 - 2⁵ = 245189967389 is a prime.

It is a super-2 number, since 2×245189967421² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245189967401) 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, 464676 + ... + 840418.

It is an arithmetic number, because the mean of its divisors is an integer number (17767430784).

Almost surely, 2^245189967421 is an apocalyptic number.

It is an amenable number.

245189967421 is a deficient number, since it is larger than the sum of its proper divisors (39088925123).

245189967421 is a wasteful number, since it uses less digits than its factorization.

245189967421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377100.

The product of its digits is 8709120, while the sum is 58.

The spelling of 245189967421 in words is "two hundred forty-five billion, one hundred eighty-nine million, nine hundred sixty-seven thousand, four hundred twenty-one".