7906778712 has 384 divisors, whose sum is σ = 27266803200. Its totient is φ = 2096160768.

The previous prime is 7906778707. The next prime is 7906778713. The reversal of 7906778712 is 2178776097.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7906778713) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 13702968 + ... + 13703544.

It is an arithmetic number, because the mean of its divisors is an integer number (71007300).

Almost surely, 2^7906778712 is an apocalyptic number.

7906778712 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7906778712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13633401600).

7906778712 is an abundant number, since it is smaller than the sum of its proper divisors (19360024488).

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

7906778712 is a wasteful number, since it uses less digits than its factorization.

7906778712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 677 (or 661 counting only the distinct ones).

The product of its (nonzero) digits is 2074464, while the sum is 54.

The square root of 7906778712 is about 88920.0692307423. The cubic root of 7906778712 is about 1992.2011881280.

The spelling of 7906778712 in words is "seven billion, nine hundred six million, seven hundred seventy-eight thousand, seven hundred twelve".