7745678020 has 24 divisors (see below), whose sum is σ = 16612009344. Its totient is φ = 3032350176.

The previous prime is 7745678009. The next prime is 7745678027. The reversal of 7745678020 is 208765477.

It is a super-2 number, since 2×7745678020² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7745678027) 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, 4119102 + ... + 4120981.

It is an arithmetic number, because the mean of its divisors is an integer number (692167056).

Almost surely, 2^7745678020 is an apocalyptic number.

It is an amenable number.

7745678020 is an abundant number, since it is smaller than the sum of its proper divisors (8866331324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7745678020 is a wasteful number, since it uses less digits than its factorization.

7745678020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8240139 (or 8240137 counting only the distinct ones).

The product of its (nonzero) digits is 658560, while the sum is 46.

The square root of 7745678020 is about 88009.5336881181. The cubic root of 7745678020 is about 1978.5778670077.

The spelling of 7745678020 in words is "seven billion, seven hundred forty-five million, six hundred seventy-eight thousand, twenty".