420825198515 has 16 divisors (see below), whose sum is σ = 506046949632. Its totient is φ = 335956134624.

The previous prime is 420825198509. The next prime is 420825198527. The reversal of 420825198515 is 515891528024.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 420825198515 - 2²² = 420821004211 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7918562 + ... + 7971528.

It is an arithmetic number, because the mean of its divisors is an integer number (31627934352).

Almost surely, 2^420825198515 is an apocalyptic number.

420825198515 is the 529670-th pentagonal number.

420825198515 is a deficient number, since it is larger than the sum of its proper divisors (85221751117).

420825198515 is a wasteful number, since it uses less digits than its factorization.

420825198515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56266.

The product of its (nonzero) digits is 1152000, while the sum is 50.

The spelling of 420825198515 in words is "four hundred twenty billion, eight hundred twenty-five million, one hundred ninety-eight thousand, five hundred fifteen".