616661556510 has 32 divisors (see below), whose sum is σ = 1480010216832. Its totient is φ = 164440583840.

The previous prime is 616661556457. The next prime is 616661556523. The reversal of 616661556510 is 15655166616.

It is a self number, because there is not a number n which added to its sum of digits gives 616661556510.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2720977 + ... + 2938883.

It is an arithmetic number, because the mean of its divisors is an integer number (46250319276).

Almost surely, 2^616661556510 is an apocalyptic number.

616661556510 is an abundant number, since it is smaller than the sum of its proper divisors (863348660322).

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

616661556510 is a wasteful number, since it uses less digits than its factorization.

616661556510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312248.

The product of its (nonzero) digits is 972000, while the sum is 48.

The spelling of 616661556510 in words is "six hundred sixteen billion, six hundred sixty-one million, five hundred fifty-six thousand, five hundred ten".