61061510515501 has 4 divisors (see below), whose sum is σ = 61061535090400. Its totient is φ = 61061485940604.

The previous prime is 61061510515493. The next prime is 61061510515507. The reversal of 61061510515501 is 10551501516016.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61061510515501 - 2³ = 61061510515493 is a prime.

It is a super-2 number, since 2×61061510515501² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61061510515507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8080191 + ... + 13689868.

It is an arithmetic number, because the mean of its divisors is an integer number (15265383772600).

Almost surely, 2^{61061510515501} is an apocalyptic number.

It is an amenable number.

61061510515501 is a deficient number, since it is larger than the sum of its proper divisors (24574899).

61061510515501 is a wasteful number, since it uses less digits than its factorization.

61061510515501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24574898.

The product of its (nonzero) digits is 22500, while the sum is 37.

The spelling of 61061510515501 in words is "sixty-one trillion, sixty-one billion, five hundred ten million, five hundred fifteen thousand, five hundred one".