61356545 has 16 divisors (see below), whose sum is σ = 76871568. Its totient is φ = 46967040.

The previous prime is 61356539. The next prime is 61356551. The reversal of 61356545 is 54565316.

It is an interprime number because it is at equal distance from previous prime (61356539) and next prime (61356551).

It can be written as a sum of positive squares in 8 ways, for example, as 781456 + 60575089 = 884^2 + 7783^2 .

It is not a de Polignac number, because 61356545 - 2⁶ = 61356481 is a prime.

It is a super-2 number, since 2×61356545² = 7529251228674050, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8567 + ... + 14003.

It is an arithmetic number, because the mean of its divisors is an integer number (4804473).

Almost surely, 2^61356545 is an apocalyptic number.

It is an amenable number.

61356545 is a deficient number, since it is larger than the sum of its proper divisors (15515023).

61356545 is a wasteful number, since it uses less digits than its factorization.

61356545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5540.

The product of its digits is 54000, while the sum is 35.

The square root of 61356545 is about 7833.0418740104. The cubic root of 61356545 is about 394.4151897161.

The spelling of 61356545 in words is "sixty-one million, three hundred fifty-six thousand, five hundred forty-five".