61514780 has 24 divisors (see below), whose sum is σ = 135980880. Its totient is φ = 23310720.

The previous prime is 61514767. The next prime is 61514807. The reversal of 61514780 is 8741516.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80561 + ... + 81320.

It is an arithmetic number, because the mean of its divisors is an integer number (5665870).

Almost surely, 2^61514780 is an apocalyptic number.

It is an amenable number.

61514780 is an abundant number, since it is smaller than the sum of its proper divisors (74466100).

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

61514780 is a wasteful number, since it uses less digits than its factorization.

61514780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161909 (or 161907 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 61514780 is about 7843.1358524509. The cubic root of 61514780 is about 394.7539566911.

The spelling of 61514780 in words is "sixty-one million, five hundred fourteen thousand, seven hundred eighty".