1020661102457 has 8 divisors (see below), whose sum is σ = 1022560149600. Its totient is φ = 1018763456544.

The previous prime is 1020661102427. The next prime is 1020661102493. The reversal of 1020661102457 is 7542011660201.

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 1020661102457 - 2⁶ = 1020661102393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020661102427) 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, 1113533 + ... + 1811429.

It is an arithmetic number, because the mean of its divisors is an integer number (127820018700).

Almost surely, 2^{1020661102457} is an apocalyptic number.

It is an amenable number.

1020661102457 is a deficient number, since it is larger than the sum of its proper divisors (1899047143).

1020661102457 is an equidigital number, since it uses as much as digits as its factorization.

1020661102457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700615.

The product of its (nonzero) digits is 20160, while the sum is 35.

Adding to 1020661102457 its reverse (7542011660201), we get a palindrome (8562672762658).

The spelling of 1020661102457 in words is "one trillion, twenty billion, six hundred sixty-one million, one hundred two thousand, four hundred fifty-seven".