671155517625 has 16 divisors (see below), whose sum is σ = 1116802781952. Its totient is φ = 357949609200.

The previous prime is 671155517621. The next prime is 671155517633. The reversal of 671155517625 is 526715551176.

It is not a de Polignac number, because 671155517625 - 2² = 671155517621 is a prime.

It is a super-4 number, since 4×671155517625⁴ (a number of 48 digits) contains 4444 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (671155517621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 894873649 + ... + 894874398.

It is an arithmetic number, because the mean of its divisors is an integer number (69800173872).

Almost surely, 2^671155517625 is an apocalyptic number.

It is an amenable number.

671155517625 is a deficient number, since it is larger than the sum of its proper divisors (445647264327).

671155517625 is a wasteful number, since it uses less digits than its factorization.

671155517625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1789748065 (or 1789748055 counting only the distinct ones).

The product of its digits is 2205000, while the sum is 51.

The spelling of 671155517625 in words is "six hundred seventy-one billion, one hundred fifty-five million, five hundred seventeen thousand, six hundred twenty-five".