1020702678849 has 48 divisors (see below), whose sum is σ = 1729796350464. Its totient is φ = 567803174400.

The previous prime is 1020702678839. The next prime is 1020702678857. The reversal of 1020702678849 is 9488762070201.

It is a happy number.

It is not a de Polignac number, because 1020702678849 - 2¹³ = 1020702670657 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1020702678795 and 1020702678804.

It is not an unprimeable number, because it can be changed into a prime (1020702678839) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 769189 + ... + 1622669.

It is an arithmetic number, because the mean of its divisors is an integer number (36037423968).

Almost surely, 2^{1020702678849} is an apocalyptic number.

It is an amenable number.

1020702678849 is a deficient number, since it is larger than the sum of its proper divisors (709093671615).

1020702678849 is a wasteful number, since it uses less digits than its factorization.

1020702678849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 853998 (or 853995 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 54.

The spelling of 1020702678849 in words is "one trillion, twenty billion, seven hundred two million, six hundred seventy-eight thousand, eight hundred forty-nine".