77800007421534 has 32 divisors (see below), whose sum is σ = 156500894499840. Its totient is φ = 25783191990752.

The previous prime is 77800007421523. The next prime is 77800007421541. The reversal of 77800007421534 is 43512470000877.

77800007421534 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137280247 + ... + 137845805.

It is an arithmetic number, because the mean of its divisors is an integer number (4890652953120).

Almost surely, 2^{77800007421534} is an apocalyptic number.

77800007421534 is an abundant number, since it is smaller than the sum of its proper divisors (78700887078306).

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

77800007421534 is a wasteful number, since it uses less digits than its factorization.

77800007421534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698264.

The product of its (nonzero) digits is 1317120, while the sum is 48.

The spelling of 77800007421534 in words is "seventy-seven trillion, eight hundred billion, seven million, four hundred twenty-one thousand, five hundred thirty-four".