1670401551 has 48 divisors (see below), whose sum is σ = 2832893952. Its totient is φ = 852534720.

The previous prime is 1670401543. The next prime is 1670401553. The reversal of 1670401551 is 1551040761.

It is not a de Polignac number, because 1670401551 - 2³ = 1670401543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1670401553) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 259170 + ... + 265536.

It is an arithmetic number, because the mean of its divisors is an integer number (59018624).

Almost surely, 2^1670401551 is an apocalyptic number.

1670401551 is a deficient number, since it is larger than the sum of its proper divisors (1162492401).

1670401551 is a wasteful number, since it uses less digits than its factorization.

1670401551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6452 (or 6421 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 30.

The square root of 1670401551 is about 40870.5462527723. The cubic root of 1670401551 is about 1186.5160797724.

The spelling of 1670401551 in words is "one billion, six hundred seventy million, four hundred one thousand, five hundred fifty-one".