625642453501 has 8 divisors (see below), whose sum is σ = 673787109240. Its totient is φ = 577500413952.

The previous prime is 625642453493. The next prime is 625642453523. The reversal of 625642453501 is 105354246526.

It can be written as a sum of positive squares in 4 ways, for example, as 111659564025 + 513982889476 = 334155^2 + 716926^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 625642453501 - 2³ = 625642453493 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 (625642453531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142540 + ... + 1127653.

It is an arithmetic number, because the mean of its divisors is an integer number (84223388655).

Almost surely, 2^625642453501 is an apocalyptic number.

It is an amenable number.

625642453501 is a deficient number, since it is larger than the sum of its proper divisors (48144655739).

625642453501 is a wasteful number, since it uses less digits than its factorization.

625642453501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1308095.

The product of its (nonzero) digits is 864000, while the sum is 43.

The spelling of 625642453501 in words is "six hundred twenty-five billion, six hundred forty-two million, four hundred fifty-three thousand, five hundred one".