77616170730 has 160 divisors (see below), whose sum is σ = 239501522304. Its totient is φ = 17740524096.

The previous prime is 77616170719. The next prime is 77616170741. The reversal of 77616170730 is 3707161677.

It is an interprime number because it is at equal distance from previous prime (77616170719) and next prime (77616170741).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1349644 + ... + 1405976.

Almost surely, 2^77616170730 is an apocalyptic number.

77616170730 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 77616170730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119750761152).

77616170730 is an abundant number, since it is smaller than the sum of its proper divisors (161885351574).

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

77616170730 is an frugal number, since it uses more digits than its factorization.

77616170730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56374 (or 56350 counting only the distinct ones).

The product of its (nonzero) digits is 259308, while the sum is 45.

The spelling of 77616170730 in words is "seventy-seven billion, six hundred sixteen million, one hundred seventy thousand, seven hundred thirty".