656146451 has 4 divisors (see below), whose sum is σ = 659037192. Its totient is φ = 653255712.

The previous prime is 656146423. The next prime is 656146471. The reversal of 656146451 is 154641656.

It is a happy number.

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-656146451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (656146471) 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, 1445030 + ... + 1445483.

It is an arithmetic number, because the mean of its divisors is an integer number (164759298).

Almost surely, 2^656146451 is an apocalyptic number.

656146451 is a deficient number, since it is larger than the sum of its proper divisors (2890741).

656146451 is a wasteful number, since it uses less digits than its factorization.

656146451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2890740.

The product of its digits is 86400, while the sum is 38.

The square root of 656146451 is about 25615.3557656340. The cubic root of 656146451 is about 868.9609522672.

The spelling of 656146451 in words is "six hundred fifty-six million, one hundred forty-six thousand, four hundred fifty-one".