77959511408402 has 32 divisors (see below), whose sum is σ = 126336340249392. Its totient is φ = 35866576134144.

The previous prime is 77959511408393. The next prime is 77959511408423. The reversal of 77959511408402 is 20480411595977.

It can be written as a sum of positive squares in 8 ways, for example, as 5862107750041 + 72097403658361 = 2421179^2 + 8491019^2 .

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, 38557148 + ... + 40528664.

Almost surely, 2^{77959511408402} is an apocalyptic number.

77959511408402 is a deficient number, since it is larger than the sum of its proper divisors (48376828840990).

77959511408402 is a wasteful number, since it uses less digits than its factorization.

77959511408402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1976382.

The product of its (nonzero) digits is 25401600, while the sum is 62.

The spelling of 77959511408402 in words is "seventy-seven trillion, nine hundred fifty-nine billion, five hundred eleven million, four hundred eight thousand, four hundred two".