781533425450042 has 8 divisors (see below), whose sum is σ = 1172300938776000. Its totient is φ = 390766445858044.

The previous prime is 781533425449999. The next prime is 781533425450059. The reversal of 781533425450042 is 240054524335187.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-4 number, since 4×781533425450042⁴ (a number of 61 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129752492 + ... + 135642087.

It is an arithmetic number, because the mean of its divisors is an integer number (146537617347000).

Almost surely, 2^{781533425450042} is an apocalyptic number.

781533425450042 is a deficient number, since it is larger than the sum of its proper divisors (390767513325958).

781533425450042 is a wasteful number, since it uses less digits than its factorization.

781533425450042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266866980.

The product of its (nonzero) digits is 16128000, while the sum is 53.

The spelling of 781533425450042 in words is "seven hundred eighty-one trillion, five hundred thirty-three billion, four hundred twenty-five million, four hundred fifty thousand, forty-two".