1245671771904 has 1152 divisors, whose sum is σ = 4699957248000. Its totient is φ = 323839918080.

The previous prime is 1245671771893. The next prime is 1245671771963. The reversal of 1245671771904 is 4091771765421.

1245671771904 is a `hidden beast` number, since 1 + 2 + 4 + 567 + 1 + 7 + 71 + 9 + 0 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (1152).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1249419534 + ... + 1249420530.

It is an arithmetic number, because the mean of its divisors is an integer number (4079824000).

Almost surely, 2^{1245671771904} is an apocalyptic number.

1245671771904 is a gapful number since it is divisible by the number (14) 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 1245671771904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2349978624000).

1245671771904 is an abundant number, since it is smaller than the sum of its proper divisors (3454285476096).

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

1245671771904 is an equidigital number, since it uses as much as digits as its factorization.

1245671771904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1091 (or 1057 counting only the distinct ones).

The product of its (nonzero) digits is 2963520, while the sum is 54.

The spelling of 1245671771904 in words is "one trillion, two hundred forty-five billion, six hundred seventy-one million, seven hundred seventy-one thousand, nine hundred four".