1552735861 has 2 divisors, whose sum is σ = 1552735862. Its totient is φ = 1552735860.

The previous prime is 1552735853. The next prime is 1552735867. The reversal of 1552735861 is 1685372551.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1371294961 + 181440900 = 37031^2 + 13470^2 .

It is a cyclic number.

It is not a de Polignac number, because 1552735861 - 2³ = 1552735853 is a prime.

It is a super-2 number, since 2×1552735861² = 4821977308070822642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1552735867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 776367930 + 776367931.

It is an arithmetic number, because the mean of its divisors is an integer number (776367931).

Almost surely, 2^1552735861 is an apocalyptic number.

It is an amenable number.

1552735861 is a deficient number, since it is larger than the sum of its proper divisors (1).

1552735861 is an equidigital number, since it uses as much as digits as its factorization.

1552735861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 252000, while the sum is 43.

The square root of 1552735861 is about 39404.7695209603. The cubic root of 1552735861 is about 1157.9750296140.

The spelling of 1552735861 in words is "one billion, five hundred fifty-two million, seven hundred thirty-five thousand, eight hundred sixty-one".