1551889061 has 8 divisors (see below), whose sum is σ = 1571222784. Its totient is φ = 1532674800.

The previous prime is 1551889057. The next prime is 1551889063. The reversal of 1551889061 is 1609881551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1551889061 - 2² = 1551889057 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1551889063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3581 + ... + 55826.

It is an arithmetic number, because the mean of its divisors is an integer number (196402848).

Almost surely, 2^1551889061 is an apocalyptic number.

It is an amenable number.

1551889061 is a deficient number, since it is larger than the sum of its proper divisors (19333723).

1551889061 is a wasteful number, since it uses less digits than its factorization.

1551889061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59731.

The product of its (nonzero) digits is 86400, while the sum is 44.

The square root of 1551889061 is about 39394.0231634191. The cubic root of 1551889061 is about 1157.7644869220.

The spelling of 1551889061 in words is "one billion, five hundred fifty-one million, eight hundred eighty-nine thousand, sixty-one".