651381696 has 280 divisors, whose sum is σ = 2248194640. Its totient is φ = 184923648.

The previous prime is 651381691. The next prime is 651381727. The reversal of 651381696 is 696183156.

It is a super-2 number, since 2×651381696² = 848596227767672832, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651381691) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 4148850 + ... + 4149006.

Almost surely, 2^651381696 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 651381696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1124097320).

651381696 is an abundant number, since it is smaller than the sum of its proper divisors (1596812944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

651381696 is an equidigital number, since it uses as much as digits as its factorization.

651381696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206 (or 169 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 651381696 is about 25522.1804711118. The cubic root of 651381696 is about 866.8524551070.

It can be divided in two parts, 6513 and 81696, that added together give a square (88209 = 297²).

The spelling of 651381696 in words is "six hundred fifty-one million, three hundred eighty-one thousand, six hundred ninety-six".