61651453 has 2 divisors, whose sum is σ = 61651454. Its totient is φ = 61651452.

The previous prime is 61651439. The next prime is 61651459. The reversal of 61651453 is 35415616.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41964484 + 19686969 = 6478^2 + 4437^2 .

It is a cyclic number.

It is not a de Polignac number, because 61651453 - 2²⁵ = 28097021 is a prime.

It is a super-2 number, since 2×61651453² = 7601803314022418, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61651459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30825726 + 30825727.

It is an arithmetic number, because the mean of its divisors is an integer number (30825727).

Almost surely, 2^61651453 is an apocalyptic number.

It is an amenable number.

61651453 is a deficient number, since it is larger than the sum of its proper divisors (1).

61651453 is an equidigital number, since it uses as much as digits as its factorization.

61651453 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10800, while the sum is 31.

The square root of 61651453 is about 7851.8439235634. The cubic root of 61651453 is about 395.0460940708.

The spelling of 61651453 in words is "sixty-one million, six hundred fifty-one thousand, four hundred fifty-three".