245330502021551 has 4 divisors (see below), whose sum is σ = 246955207333104. Its totient is φ = 243705796710000.

The previous prime is 245330502021503. The next prime is 245330502021557. The reversal of 245330502021551 is 155120205033542.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245330502021551 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 (245330502021557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 812352655550 + ... + 812352655851.

It is an arithmetic number, because the mean of its divisors is an integer number (61738801833276).

Almost surely, 2^{245330502021551} is an apocalyptic number.

245330502021551 is a deficient number, since it is larger than the sum of its proper divisors (1624705311553).

245330502021551 is a wasteful number, since it uses less digits than its factorization.

245330502021551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1624705311552.

The product of its (nonzero) digits is 180000, while the sum is 38.

The spelling of 245330502021551 in words is "two hundred forty-five trillion, three hundred thirty billion, five hundred two million, twenty-one thousand, five hundred fifty-one".