651438253417 has 12 divisors (see below), whose sum is σ = 782240537856. Its totient is φ = 540363526920.

The previous prime is 651438253409. The next prime is 651438253447. The reversal of 651438253417 is 714352834156.

It is not a de Polignac number, because 651438253417 - 2³ = 651438253409 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (651438253447) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 214428453 + ... + 214431490.

It is an arithmetic number, because the mean of its divisors is an integer number (65186711488).

Almost surely, 2^651438253417 is an apocalyptic number.

It is an amenable number.

651438253417 is a deficient number, since it is larger than the sum of its proper divisors (130802284439).

651438253417 is a wasteful number, since it uses less digits than its factorization.

651438253417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428859988 (or 428859981 counting only the distinct ones).

The product of its digits is 2419200, while the sum is 49.

The spelling of 651438253417 in words is "six hundred fifty-one billion, four hundred thirty-eight million, two hundred fifty-three thousand, four hundred seventeen".