1610621651602 has 4 divisors (see below), whose sum is σ = 2415932477406. Its totient is φ = 805310825800.

The previous prime is 1610621651497. The next prime is 1610621651621. The reversal of 1610621651602 is 2061561260161.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1556183895841 + 54437755761 = 1247471^2 + 233319^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402655412899 + ... + 402655412902.

Almost surely, 2^{1610621651602} is an apocalyptic number.

1610621651602 is a deficient number, since it is larger than the sum of its proper divisors (805310825804).

1610621651602 is an equidigital number, since it uses as much as digits as its factorization.

1610621651602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805310825803.

The product of its (nonzero) digits is 25920, while the sum is 37.

The spelling of 1610621651602 in words is "one trillion, six hundred ten billion, six hundred twenty-one million, six hundred fifty-one thousand, six hundred two".