1020625340665 has 48 divisors (see below), whose sum is σ = 1510002777600. Its totient is φ = 658040151552.

The previous prime is 1020625340659. The next prime is 1020625340671. The reversal of 1020625340665 is 5660435260201.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1020625340659) and next prime (1020625340671).

It is not a de Polignac number, because 1020625340665 - 2¹¹ = 1020625338617 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4123896 + ... + 4364374.

It is an arithmetic number, because the mean of its divisors is an integer number (31458391200).

Almost surely, 2^{1020625340665} is an apocalyptic number.

It is an amenable number.

1020625340665 is a deficient number, since it is larger than the sum of its proper divisors (489377436935).

1020625340665 is a wasteful number, since it uses less digits than its factorization.

1020625340665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241534 (or 241527 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 40.

The spelling of 1020625340665 in words is "one trillion, twenty billion, six hundred twenty-five million, three hundred forty thousand, six hundred sixty-five".