61524351551 has 16 divisors (see below), whose sum is σ = 70706893824. Its totient is φ = 53030121984.

The previous prime is 61524351533. The next prime is 61524351557. The reversal of 61524351551 is 15515342516.

It is a cyclic number.

It is not a de Polignac number, because 61524351551 - 2⁶ = 61524351487 is a prime.

It is a super-2 number, since 2×61524351551² (a number of 22 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 (61524351557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1067960 + ... + 1124093.

It is an arithmetic number, because the mean of its divisors is an integer number (4419180864).

Almost surely, 2^61524351551 is an apocalyptic number.

61524351551 is a deficient number, since it is larger than the sum of its proper divisors (9182542273).

61524351551 is a wasteful number, since it uses less digits than its factorization.

61524351551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2192210.

The product of its digits is 90000, while the sum is 38.

The spelling of 61524351551 in words is "sixty-one billion, five hundred twenty-four million, three hundred fifty-one thousand, five hundred fifty-one".