402191101925 has 6 divisors (see below), whose sum is σ = 498716966418. Its totient is φ = 321752881520.

The previous prime is 402191101919. The next prime is 402191101931. The reversal of 402191101925 is 529101191204.

It is an interprime number because it is at equal distance from previous prime (402191101919) and next prime (402191101931).

It can be written as a sum of positive squares in 3 ways, for example, as 130568763649 + 271622338276 = 361343^2 + 521174^2 .

It is not a de Polignac number, because 402191101925 - 2¹² = 402191097829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8043822014 + ... + 8043822063.

It is an arithmetic number, because the mean of its divisors is an integer number (83119494403).

Almost surely, 2^402191101925 is an apocalyptic number.

It is an amenable number.

402191101925 is a deficient number, since it is larger than the sum of its proper divisors (96525864493).

402191101925 is a wasteful number, since it uses less digits than its factorization.

402191101925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16087644087 (or 16087644082 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 35.

The spelling of 402191101925 in words is "four hundred two billion, one hundred ninety-one million, one hundred one thousand, nine hundred twenty-five".