61512987954 has 32 divisors (see below), whose sum is σ = 138539520000. Its totient is φ = 18038998800.

The previous prime is 61512987953. The next prime is 61512987967. The reversal of 61512987954 is 45978921516.

It is a happy number.

It is a super-2 number, since 2×61512987954² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61512987894 and 61512987903.

It is not an unprimeable number, because it can be changed into a prime (61512987953) 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, 15030454 + ... + 15034545.

It is an arithmetic number, because the mean of its divisors is an integer number (4329360000).

Almost surely, 2^61512987954 is an apocalyptic number.

61512987954 is an abundant number, since it is smaller than the sum of its proper divisors (77026532046).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61512987954 is a wasteful number, since it uses less digits than its factorization.

61512987954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30065046.

The product of its digits is 5443200, while the sum is 57.

The spelling of 61512987954 in words is "sixty-one billion, five hundred twelve million, nine hundred eighty-seven thousand, nine hundred fifty-four".