6451390726425 has 384 divisors, whose sum is σ = 13123165777920. Its totient is φ = 3097224345600.

The previous prime is 6451390726421. The next prime is 6451390726507. The reversal of 6451390726425 is 5246270931546.

It is a happy number.

6451390726425 is a `hidden beast` number, since 64 + 5 + 1 + 3 + 90 + 72 + 6 + 425 = 666.

It is not a de Polignac number, because 6451390726425 - 2² = 6451390726421 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6451390726421) by changing a digit.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 2642928205 + ... + 2642930645.

It is an arithmetic number, because the mean of its divisors is an integer number (34174910880).

Almost surely, 2^{6451390726425} is an apocalyptic number.

It is an amenable number.

6451390726425 is an abundant number, since it is smaller than the sum of its proper divisors (6671775051495).

6451390726425 is a wasteful number, since it uses less digits than its factorization.

6451390726425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2670 (or 2659 counting only the distinct ones).

The product of its (nonzero) digits is 10886400, while the sum is 54.

The spelling of 6451390726425 in words is "six trillion, four hundred fifty-one billion, three hundred ninety million, seven hundred twenty-six thousand, four hundred twenty-five".