61018497 has 6 divisors (see below), whose sum is σ = 88137842. Its totient is φ = 40678992.

The previous prime is 61018493. The next prime is 61018499. The reversal of 61018497 is 79481016.

It can be written as a sum of positive squares in only one way, i.e., 48316401 + 12702096 = 6951^2 + 3564^2 .

It is not a de Polignac number, because 61018497 - 2² = 61018493 is a prime.

It is a super-2 number, since 2×61018497² = 7446513952278018, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61018493) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3389908 + ... + 3389925.

Almost surely, 2^61018497 is an apocalyptic number.

It is an amenable number.

61018497 is a deficient number, since it is larger than the sum of its proper divisors (27119345).

61018497 is a wasteful number, since it uses less digits than its factorization.

61018497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6779839 (or 6779836 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 61018497 is about 7811.4337352371. The cubic root of 61018497 is about 393.6895030260.

The spelling of 61018497 in words is "sixty-one million, eighteen thousand, four hundred ninety-seven".