77401754400242 has 4 divisors (see below), whose sum is σ = 116102631600366. Its totient is φ = 38700877200120.

The previous prime is 77401754400221. The next prime is 77401754400247. The reversal of 77401754400242 is 24200445710477.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 46131413424121 + 31270340976121 = 6792011^2 + 5591989^2 .

It is not an unprimeable number, because it can be changed into a prime (77401754400247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19350438600059 + ... + 19350438600062.

Almost surely, 2^{77401754400242} is an apocalyptic number.

77401754400242 is a deficient number, since it is larger than the sum of its proper divisors (38700877200124).

77401754400242 is a wasteful number, since it uses less digits than its factorization.

77401754400242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38700877200123.

The product of its (nonzero) digits is 1756160, while the sum is 47.

The spelling of 77401754400242 in words is "seventy-seven trillion, four hundred one billion, seven hundred fifty-four million, four hundred thousand, two hundred forty-two".