77070651560 has 96 divisors (see below), whose sum is σ = 201799281960. Its totient is φ = 26413922304.

The previous prime is 77070651551. The next prime is 77070651589. The reversal of 77070651560 is 6515607077.

It can be written as a sum of positive squares in 4 ways, for example, as 53445117124 + 23625534436 = 231182^2 + 153706^2 .

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6377684 + ... + 6389756.

Almost surely, 2^77070651560 is an apocalyptic number.

77070651560 is a gapful number since it is divisible by the number (70) 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 77070651560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100899640980).

77070651560 is an abundant number, since it is smaller than the sum of its proper divisors (124728630400).

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

77070651560 is a wasteful number, since it uses less digits than its factorization.

77070651560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15355 (or 15344 counting only the distinct ones).

The product of its (nonzero) digits is 308700, while the sum is 44.

The spelling of 77070651560 in words is "seventy-seven billion, seventy million, six hundred fifty-one thousand, five hundred sixty".