77501487380 has 192 divisors, whose sum is σ = 176293877760. Its totient is φ = 28565913600.

The previous prime is 77501487311. The next prime is 77501487383. The reversal of 77501487380 is 8378410577.

It is a happy number.

It is a super-2 number, since 2×77501487380² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77501487383) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 229974572 + ... + 229974908.

It is an arithmetic number, because the mean of its divisors is an integer number (918197280).

Almost surely, 2^77501487380 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77501487380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88146938880).

77501487380 is an abundant number, since it is smaller than the sum of its proper divisors (98792390380).

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

77501487380 is a wasteful number, since it uses less digits than its factorization.

77501487380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610 (or 608 counting only the distinct ones).

The product of its (nonzero) digits is 1317120, while the sum is 50.

The spelling of 77501487380 in words is "seventy-seven billion, five hundred one million, four hundred eighty-seven thousand, three hundred eighty".