61151634880 has 56 divisors (see below), whose sum is σ = 166419812448. Its totient is φ = 20966274048.

The previous prime is 61151634877. The next prime is 61151634883. The reversal of 61151634880 is 8843615116.

It is an interprime number because it is at equal distance from previous prime (61151634877) and next prime (61151634883).

It is a tau number, because it is divible by the number of its divisors (56).

It is a super-2 number, since 2×61151634880² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61151634883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13647679 + ... + 13652158.

Almost surely, 2^61151634880 is an apocalyptic number.

It is an amenable number.

61151634880 is an abundant number, since it is smaller than the sum of its proper divisors (105268177568).

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

61151634880 is a wasteful number, since it uses less digits than its factorization.

61151634880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27299861 (or 27299851 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 43.

The spelling of 61151634880 in words is "sixty-one billion, one hundred fifty-one million, six hundred thirty-four thousand, eight hundred eighty".