378451906497 has 24 divisors (see below), whose sum is σ = 626394450240. Its totient is φ = 215687616480.

The previous prime is 378451906493. The next prime is 378451906517. The reversal of 378451906497 is 794609154873.

378451906497 is a `hidden beast` number, since 3 + 7 + 8 + 4 + 51 + 90 + 6 + 497 = 666.

It is not a de Polignac number, because 378451906497 - 2² = 378451906493 is a prime.

It is a super-3 number, since 3×378451906497³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (378451906493) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7901154 + ... + 7948907.

It is an arithmetic number, because the mean of its divisors is an integer number (26099768760).

Almost surely, 2^378451906497 is an apocalyptic number.

It is an amenable number.

378451906497 is a deficient number, since it is larger than the sum of its proper divisors (247942543743).

378451906497 is a wasteful number, since it uses less digits than its factorization.

378451906497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15850453 (or 15850450 counting only the distinct ones).

The product of its (nonzero) digits is 45722880, while the sum is 63.

The spelling of 378451906497 in words is "three hundred seventy-eight billion, four hundred fifty-one million, nine hundred six thousand, four hundred ninety-seven".