61557363 has 24 divisors (see below), whose sum is σ = 101909600. Its totient is φ = 35074944.

The previous prime is 61557341. The next prime is 61557383. The reversal of 61557363 is 36375516.

It is a happy number.

61557363 is a `hidden beast` number, since 615 + 5 + 7 + 36 + 3 = 666.

It is not a de Polignac number, because 61557363 - 2⁶ = 61557299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61557313) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24573 + ... + 26961.

Almost surely, 2^61557363 is an apocalyptic number.

61557363 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

61557363 is a deficient number, since it is larger than the sum of its proper divisors (40352237).

61557363 is a wasteful number, since it uses less digits than its factorization.

61557363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2811 (or 2808 counting only the distinct ones).

The product of its digits is 56700, while the sum is 36.

The square root of 61557363 is about 7845.8500495485. The cubic root of 61557363 is about 394.8450238591.

The spelling of 61557363 in words is "sixty-one million, five hundred fifty-seven thousand, three hundred sixty-three".