671003777136 has 160 divisors (see below), whose sum is σ = 2161588935168. Its totient is φ = 174251704320.

The previous prime is 671003777113. The next prime is 671003777137. The reversal of 671003777136 is 631777300176.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671003777137) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21987040 + ... + 22017536.

Almost surely, 2^671003777136 is an apocalyptic number.

671003777136 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 671003777136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1080794467584).

671003777136 is an abundant number, since it is smaller than the sum of its proper divisors (1490585158032).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

671003777136 is a wasteful number, since it uses less digits than its factorization.

671003777136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36479 (or 36473 counting only the distinct ones).

The product of its (nonzero) digits is 777924, while the sum is 48.

The spelling of 671003777136 in words is "six hundred seventy-one billion, three million, seven hundred seventy-seven thousand, one hundred thirty-six".